Just run PHP and MySQL locally? Native PHP on Windows is horrible to set up, but with WSL/WSL2 you suddenly can get a normal Linux environment without much hassle.

sudo apt install nginx php mysql, point the www directory of nginx to something on your computer (/mnt/c/projects/xyz) and you've got a running setup. Or run Linux in general, that's what most people I've seen work on backends seem to do. You can run the same flavour of software that your deployment server runs so it'll save you time testing and comparing API changes or version incompatibilities as well.

I don't know any solution for macOS but you can probably get the necessary software via Brew if you're so inclined. Then run the built-in PHP web server (php -s) and you get the same effect.