I noticed that using Tetra tools or weapons does not unlock Trinkets. Curious if it would be possible to introduce a tag system where as long as the Tool contains a specific tag it will count as a valid tool, and count toward the chances of unlocking trinkets.

It feels punishing at the moment that I have to choose one mod over the other when doing my tasks around the base.

I have been unlocking Trinkets using Tetra just fine. After looking into this more, it seems like there's a 2 minute cooldown between unlocking trinkets that isn't configurable at the moment. Perhaps this is the reason why it may seem like it is not working?

Seems to be working okay in the latest version. Tested by setting the trinket unlock cooldown to zero and the killing trinket chance to 2.

Was using the following mods:
jei-1.16.4-7.6.1.65
Lollipop-1.16.4-3.2.4
LostTrinkets-1.16.4-0.1.11
mgui-1.16.4-3.1.3
tetra-1.16.4-3.5.3

This can probably be closed now.