This is a complete rewrite of the module, in a more modern and documented way.
Before version 5.0.0 of the collection, all tasks were in the same synthesio.ovh.ovh module, and you needed to choose which endpoint to call with the service option. That was bad.
Now it is split into multiple modules, which are easier to maintain, enhance, debug, and more ansible collection compliant.
If you are upgrading from 4.0.0 and earlier, please read the doc and update your playbooks !
Once installed, you can read the documentation of every module with ansible-doc, for example:
$ ansible-doc synthesio.ovh.public_cloud_instance_info