Is your feature request related to a problem? Please describe.
The exact issue is, that hold Items often have cracks between edges. proof
There is a Bugreport at Mojangs bugtracker, but they just blame it onto faulty Nvidia drivers which is not the case. So far I ran into that problem with any video card. Intel, AMD & Nvidia.

Describe the solution you'd like
That bug to be fixed, since Mojang clearly does not care.

Describe alternatives you've considered
None. I haven't found anything that fixes that bug.

Additional context
I have tested it on many different system configurations and the issue is always there, even in very old minecraft versions.

https://modrinth.com/mod/modelfix

You can make your own texture pack to fix this issue.
It's under the last tab called "Fixes":
https://vanillatweaks.net/picker/resource-packs/

This is a rather jarring issue and is a result of precision errors in some rather nasty code where Minecraft converts item textures into quads. I'd like to address this in Sodium at some point.