My suggestion is : Fix the bug that makes TonelibGFX completely unusable! Details here: https://tonelib.net/forums/threads/tonelib-gfx-crashes-inside-ardour.9524/ and here: https://tonelib.net/forums/threads/...b-sim-select-no-panels-in-vst3-version.10899/
Install the latest version on Tonelib-gfx, I can confirm it is working with the latest Ardour on Arch.