As someone who co-incidentally started dabbling in Astrophotography as a hobby in early 2019 before Starlink launched, back then you literally could capture a single 20-second exposure (on a very wide lens, so no obvious star trail/blur at that focal length of the Earth's rotation), and get images with no satellites.

Now (and even in 2021 it was getting hard to do that) it's pretty much impossible to do that, even with 10 second exposures.

What's needed now is multiple exposures, and merging/integrating them in something like Siril (https://siril.org/) to remove the obvious satellite trails.

However, arguably, integrating multiple exposures, while annoying and time-consuming workflow-wise (i.e. can't just look at images directly from camera) is often the better way to get slightly-less-noisy images anyway, and integrate effectively longer exposures without star-trails, so it's a tricky one.

A startup idea: launch satellites to capture clean night sky photos, with tiered subscription model of course.

Startup idea: launch anti-satellite satellites to de-orbit other satellites littering your airspace.