New potion effects not visible on item

[Pantera07]

'/viaversion dump' Output

https://dump.viaversion.com/c120b891e4434726ca2b67604bbf9b68b3fe2b1893e21f8e59c5752e142a673a

Console Error

none

Bug Description

Weaving effect does not reduce the speed decrease caused by cobweb.
And clients older than 1.20.5 will not see 1.21 potions info and their effects.

Steps to Reproduce

1. Open 1.21.1 server.
2. Connect to 1.20.4 client and test it.
   https://youtu.be/LxSBR74wtCg

Expected Behavior

I expected the weaving effect to be applied.

Additional Server Info

No response

Checklist

• Via plugins are only running on EITHER the backend servers (e.g. Paper) OR the proxy (e.g. Velocity), not on both.
• I have included a ViaVersion dump.
• If applicable, I have included a paste (not a screenshot) of the error.
• I have tried a build from https://ci.viaversion.com/ and the issue still persists.

[Barvalg]

[kennytv]

The potion lore would be something to look into, but we generally don't/can't reimplement client behavior changes if there isn't a straight forward protocol translation, this would require client mixins