You can set automatic approval of requests on two levels:

You can create an approval process with automatic approval of all requests:

Configuration → Approval flows → Basic approval flow→ Automatic approval → Save:

You can also set up an approval process with automatic approval requests of a specific absence type, e.g. remote work:

Configuration → Approval flows → Basic approval flow → Add alternative flow → Remote work → Automatic approval → Save:

In the same way, you can create alternative approval processes for different absence types.