And another surprisingly good algorithmic reverb that I’d forgotten about is the one included in Harrison’s Essentials Bundle. GVerb+ I think it is called. I have used it no problems on various live choir concert recordings to sweeten the space. Just thinking about the name, it is some kind of enhancement of the open source GVerb?
With regards another Convolution plugin, try Klangfalter available here: https://distrho.sourceforge.io/ports.php
I happily use both Convo.lv2 (x42) and the Klangfalter one however at this point Convo.lv2 seems to have become my go-to in Linux world.
Also on that ports page is a great LUFS meter (I upgraded to the multimeter https://www.klangfreund.com/multimeter/) but, again, x42 loudness meters are hard to beat. And for $30 more, you get all the nice BBC VU needle-meter stuff too.