Can we track backend api calls with Matomo?

General questions
1

We want to track backend API calls. Does Matomo support such tracking?

2

Of course!

Just make requests to the tracking API with the data you want to track:
https://developer.matomo.org/api-reference/tracking-api

Or use one of the clients for your programming language:
https://developer.matomo.org/guides/tracking-api-clients