I have a moderator account that I use on my server, which also has a /vanish option, which stops the join / leave message from showing.
However, the bot still shows me log on and off, which defeats the purpose.
If it'd be possible, I'd want the bot to ignore the join / leave message just from that one mod account.

In game chat:
no join message

Discord chat:
join message

I've tried setting up the username as a banned word so it get's blocked in general, however the AutoMod ignores the bot

Ah, yea seems that flew over my head, thanks :D

You can use /mc2discord hidden add yourname yo completely hide yourself from the mod.
This vanish mod have an integration that hide yourself automatically https://www.curseforge.com/minecraft/mc-mods/vanishmod