If you can do Typescript, matter.js makes it trivial to at least create a virtual matter device. Five minutes to clone the repo, build, run and pair with Google, Apple, Alexa, SmartThings, etc. The one caveat is certification. With Google you need to register as a developer so it allows an uncertified device. The others just give a warning.
See: https://github.com/project-chip/matter.js