I'm not sure but maybe Richard knows.
Can you store a Access database file on a Mac and then use a web page front end to access the data?

Pretty sure you’d still need Windows for storing your Access file. Once you have a web-based front end though, you wouldn’t even need to have an Access file on a Mac. You can still work with Access on Windows, and use your web-based front end on your OS of choice.

You can store an Access database file on a Mac drive, but that does not make it a good server for the database. Access itself and the ACE database engine need Windows to run, so a Mac cannot directly open and serve an ACCDB file the way a Windows PC running Access can.

If you build a web front end, the better approach is to put the data in a real server database such as SQL Server. The web application then connects to that database, and people can use the web page from a Mac, Windows PC, phone, tablet, or whatever.

You could also keep the Access front end and back end on a Windows machine and use Remote Desktop from the Mac. But I would not recommend putting an Access back-end file on a Mac shared folder and having multiple users connect to it over the network. Access is file-based, and that setup is asking for corruption trouble eventually.