Currently, with the latest version of both XNet (Version 1.21-7.0.6) and Botany Pots (Version 1.21.1-21.1.41), it is not possible to connect the XNet network via Connectors to Hopper Botany Pots.
Screenshot of 1.21.1
It is possible to open the configuration menu of the cable, the pot is displayed in the "Top" slot. But when activating it and leaving the config UI, nothing happens. Opening the UI again shows the Top slot as inactive again.

Back in 1.20, it was possible to connect the connectors to Hopper Botany Pots without any issue.
Screenshot of 1.20.1
I also checked other mods like Pipez and Ender IO, both are able to extract from the pots in 1.21.1. So I expect the issue to be caused by XNet.
No logs related to this topic are written, reproducable with a minimum amount of mods:
[22:03:44] [main/INFO]:
Mod List:
Name Version (Mod Id)
Bookshelf 21.1.81 (bookshelf)
BotanyPots 21.1.41 (botanypots)
McJtyLib 1.21-9.0.20 (mcjtylib)
Minecraft 1.21.1 (minecraft)
NeoForge 21.1.228 (neoforge)
PrickleMC 21.1.11 (prickle)
RFToolsBase 1.21-6.0.10 (rftoolsbase)
XNet 1.21-7.0.6 (xnet)
Currently, with the latest version of both XNet (Version 1.21-7.0.6) and Botany Pots (Version 1.21.1-21.1.41), it is not possible to connect the XNet network via Connectors to Hopper Botany Pots.
Screenshot of 1.21.1
It is possible to open the configuration menu of the cable, the pot is displayed in the "Top" slot. But when activating it and leaving the config UI, nothing happens. Opening the UI again shows the Top slot as inactive again.

Back in 1.20, it was possible to connect the connectors to Hopper Botany Pots without any issue.
Screenshot of 1.20.1
I also checked other mods like Pipez and Ender IO, both are able to extract from the pots in 1.21.1. So I expect the issue to be caused by XNet.
No logs related to this topic are written, reproducable with a minimum amount of mods: