I tend to be very biased towards the ground-based optical astronomy because that's our human experience with the night sky and they're the main kind of observations that I was trained in as a student. But radio astronomy is maybe even going to be more severely impacted than optical astronomy. It's complicated.
Radio astronomers have been competing for years for a frequency spectrum, they have this national and international relations about who gets what frequencies on the radio spectrum, for example your mobile phone service, your WiFi, any gadget that transmits has to have approval. Radio astronomers have fought long and hard to make their presence known and say "we need this chunk of the spectrum because that’s where Hydrogen emits, we can't change that", in the U.S. they go to lobbying meetings to make their voices heard, so there is already a presence of radio astronomers in some of these regulatory spaces.
The issue with growing numbers of low-Earth orbit satellite constellations is that one of the main goals they have is to send down high amounts of data for internet access so they'll be constantly beaming down loud radio signals down to Earth so people can get their internet connection. This is potentially going to cover a large amount of ground.
There are some things that they could do to try and lower the effects on radio astronomy, for example turning off their transmitters when they are over radio telescopes.
But the reality is that if you have located a set of frequencies that you are going to use, physically these waves spill over the edges, you cannot have a sharp cut off, it's just not how waves work. So even with the best intended regulations controlling what frequencies are being used by satellite companies, it is going to have some pretty serious effects on radio astronomy.