The ability to input data via PowerApps tha directly transfer the said data into a MS Word document, by using variable referencing or similar.
A concept illustration:
This is not currently on our short-term roadmap. Although we encourage the community to continue to vote on this as we consider it for future releases.
Did post a similar idea (link below) and agree this is exactly what we are after without having to buy or be tied into a 3rd party add on (of where there seems to be a few which would accomodate this also).
Powerapp Word Mail Merge