Particle command for totem of undying does not display the totems animation.

Invalid, the animation is not the particle, it's completely separate.

If it is separate, then why is the animation of the elder guardian effect shown when running the following command and the totem not when running the particle command for the Totem of Undying? 

/particle minecraft:elder_guardian ~ ~ ~ 0.25 0.25 0.25 1 1000 normal @s

In parity with that command and in order to replicate the effect through a command the way it is shown when triggering it in survival, it should be considered a bug.

Because there the elder guardian is the actual effect, unlike the totem in the totem's usage.
The totem's animation is actually the usage animation, which spawns a bunch of the totem particles.

Not being able to create it with commands is not a bug, and that'd make this a feature request.

The elder guardian animation is not the effect. It is the animation shown to you as you are being given the effect of mining fatigue from being too close to an Elder Guardian. The animation in this case is the particle, In parity with particles being given of entities or objects, thus the animation given by the Totem of Undying and green and yellow pixels is the particle effect given to you after being resurrected by a Totem of Undying. If this would not have been the case, the animation would not have been included as part of the survival method. It is not a feature request. It has surely just been overlooked.

You can also see that the Totem of Dying particle should include an animation on the wiki.

I meant that the guardian is the effect of the particle.

Again, the totem's is not, the totem's particle are the actual particles.

The wiki is not an official source and not maintained by mojang, but by it's community, meaning it can have mistakes. (Additionally, the wiki shows screenshots of where you see the particles in normal gameplay (if it's possible), which is during the totem usage animation only, it doesn't say the totem is part of the particle.)

I'd like you to clarify your reasoning's behind it instead of denying it all. I'm not sure why you think it is not the part of the particle, it is played alongside and is shown around you as a player no matter where you do look, just like the guardian animation when the effect is given to you? Could you be more specific to why you think it is not? So far you just seem to disagree with what I say based on your own opinion? It's a bug report after all, my opinion is that of course should be part of the particle command. However, if it works as intended according to the developers, then fine. But so far I have yet heard a reason to why the animation is not considered a part of the particle command according to you.

Another thing to note is that, the command that receives the input using the namespace minecraft:totem_of_undying only shows green/yellow pixels and the input using the namespace minecraft:elder_guardian shows the animation of an Elder Guardian.

If the intention was to never show the animation when running a particle command, then maybe the namespace should be minecraft:totem_of_undying_dust and possibly exclude the animation given by the elder guardian to just show pixels. However, the particle run when getting close to an Elder Guardian does not include pixelated dust and only an animation, does it make it exclusive? What if the developers decides to introduce other effects given in game that has both animation and particle dust similar to the Totem of Undying particles. Is the animation then also not considered a part of the particles? 

Your reasoning's?

Edit: I never claimed the wiki to be maintained by Developers, and as you say, it does not state that it is part of the particles. But I don't see anything about it saying that it is not part of the particles either. Hence, confirming my concerns regarding that you are just disagreeing with me. Maybe we should let this conversation end and let the developers decide if the lack of an animation is a bug or if it is not. 

This report being "Invalid" is not official, but is based on the decompiled code of Minecraft, though I personally would as well appreciate a way to display this animation.

The totem animation is not an actual particle but something which is drawn as part of the GUI (see also MC-107476).

As a side note, the elder guardian is an actual particle, class ParticleMobAppearance is a subclass of Particle (MCP names).

I appreciate that answer. Thanks. Now here is to hope it becomes a feature!