Russian creator Brother-live recently uploaded a video detailing his experiments in adding painters fibreglass mesh tape into 3D prints to increase the strength.

The process involves repeatedly pausing the prints and adding a layer of tape, then resuming. While the finished pieces are crude and require finishing, it is an interesting idea that could be developed further.

https://www.youtube.com/watch?v=6y_ahDRboFU
https://hackaday.io/project/188825-reinforcement-with-fiberglass-mesh-in-3d-printing