Significant Lag on Realm with addons

hello, my friends and i have been trying to play minecraft together on a realm, infortunately there is significant lag related to block placing and breaking, eating, smelting and redstone. we are playing with a total of 16 addons, (all listed below) this usually does come with lag and other bugs which is expected, however recently we have been trying to play and are struggling a lot more than usual especially starting arounf 5-6pm on a week day or all day on a weekend, (we are from the UK). the issues are not too bad with 1 player, with 2 players on the realm they are worse and with 3 players the realm is nearly unplayable,

we have unfortunately also had to remove 2 addons because they have conflicted, we also know that this causes issues, due to past experience with such things however I also know that we can play smoothly with very little issues and specifically lag with said addons. all though addons cause issues, seemless play on realms should be accessible considering that both the game and the addons have been played for, which is why i am requesting help.

addons on realm:

• Storage Drawers Add-on by FTB

• Colorful Glass BP v2 by Block Perfect Studios

• Plenty of Blocks v2.0.0 Add-on by Owls Cubed

• Mounts of Mayhem: Dungeons Descent by Minecraft

• Tinker’s Construct Add-on by FTB

• Furniture Add-on by XP Games

• Crops & Farms add-on by Some Game Studios

• Farming Pots Add-on BP by Blockbytes

• Structures Add-on by Teplight

• Biomes O' Plenty Add-on by 4KS Studios

• Block Furniture Add-on by Solid Blocks

• Realight Reimagined Behaviors by Tomhmagic Creations

• Waystones Add-on by Pathway Studios

• Medieval Knights Add-on by Lua Studios

• Gravestone Add-on by Darkosto

The Add-ons we had to remove are:

• More Blocks Statues Add-on by MrAniman2

• Supplementaries Add-on by Razzleberries