In some oldschool Linux audio forum I’ve read that someone liked the TAP Sigmoid Booster for bass - so I’ve tried it and I am pretty happy with it.
Regarding the TAP dynamic plugin:
There is a drop down / combo box on the TAP dynamics where you can set the “function”.
If you look at the screenshot at https://pedalboards.moddevices.com/plugins/aHR0cDovL21vZGRldmljZXMuY29tL3BsdWdpbnMvdGFwL2R5bmFtaWNz it says “2:1 comp at -6db”.
This means a compression with the ratio of 2:1 at the threshold of -6db. There are some other functions there to choose from (some more compression and some limiting functions). The offset gain control is to move the threshold. If you select - 20db of offset gain this compressor works with a threshold of -26db.
I hope this makes the whole thing a little bit more clear for you and helps you with achieving your desired sound with the MOD…