There used to be triangular panels.
I've seen some solar shingles which blended nicely with real shingles.
There are tiles (maybe, if those have hit the market.)
I think you'll pay through the nose for aesthetics. And maybe get more rapid degradation too.
If you care about aesthetics I'd suggest not installing PV, installing it out of sight, putting it on a building where a rectangular array can cleanly cover a roof face, or using it on a patio roof. Buy into community solar?
Panels with wafers are made of tempered glass for strength.
Thin-film on glass has to be non-tempered, due to temperatures involved. You might be able to cut those. But the thin film panels actually used to produce power may degrade faster than wafers.
There could be a market for look-alike parts that could be cut to fit (even wafers bonded to non-tempered glass), but such a niche that they would cost a premium. Cutting up old panels would be the way to go, except for the tempered glass.