Render distance not working proporly?

Hello again!

I wrote a report yesterday were I stated that my render distance was not working properly, here is the text:
I have a problem with minecraft realms in java 1.17.

I own a realm were me and 4 other friends play. I have been having some issues lately were my render distance does not go above 10. Even if I have set the render distance to 48 for example, it does not show more then when I have it set to 10. But the wierd thing is that my friends on the server does not have that problem (They have shown me their perspective on screenshare and it works fine for them).

I have red a lot of similar stuff of other people having the same issue. But when i read about them, the anwser is always that the person should ask the owner to raise the render distance cap on the realm. And because I am the owner i whould like to know how i do that, if thats the problem.

Also, I do not have this problem in single player, there it works just fine.

As you see in the picture I only have 10 render distance, But I have acctually have it set to 48 chunks. But anyone can see thats it is not 48 chunks.

This report was declined because I used a mod (Optifine). Now I have switched to vanilla as you can see in the screenshot.

So please now, give me a better awnser so I can understand the situation or I might unsubscribe to Minecraft Realms.

Thanks in advance!