If your host (eg. MusE) doesn't support vst3 plugins, you could run Carla for VST3 plugins, but with Stochas you can build your own VST2 version. You will need VST2SDK and a rather new version of cmake (at least 3.21). (I'm on Mint 20.2 which only has version 3.16 in the repo.)
Not sure if necessary, but I uninstalled the repo versions of cmake and cmake-data.
Download and unpack vst_sdk2_4_rev2.zip from https://archive.org/download/VST2SDK
Download latest cmake (currently version 3.26.4) from https://cmake.org/download/
Follow the instructions to build and install. I got an error about openssl, and had to run bootstrap with: ./bootstrap -- -DCMAKE_USE_OPENSSL=OFF. Alternatively, I could have installed libssl-dev...Follow the instructions on https://github.com/surge-synthesizer/stochas to build Stochas as vst2. That is, with cmake -B build -DVST2_PATH=/path/to/vstsdk2.4. You'll find the vst2 plugin libStochas.so in /build/stochas_artefacts/VST. Just copy it into ~/.vst/
DISCLAIMER: It's your own responsibility to assess the dangers, and act accordingly, associated with downloading and installing all that stuff above.