I use the fabulous recaptchav2 Extra by Sepia River. This allows you to use either Recaptcha v2 or v3, and integrates as a hook into FormIt / Formalicious.
In Formalicious v1, it was easy to implement on all forms, by adding the required fields, hook name and parameters into the formTpl, thus adding it to every single Formalicious form.
I have yet to work out how I can ad to all forms in Formalicious v2 without having to add the hook and parameters to each form individually, as well as creating a custom Input to add the required fields in as well. If I do, Iβll post it back here.