I asked for this, too. So +1, native support would be great.
Why not add a tempo tapping button next to the bpm input field? Rythmic clicks on this button and iut calculates the bpm.
I was recording some music with the sample recorder, played it and now i wanna tapping the tempo, which is currently not possible
https://forum.renoise.com/t/tempo-tapping-button-next-to-bpm/40953