I think you're being quite selfish, TBH.
I live in a block of flats, so as much as I wanted to get a treadmill during lockdown, I didn't, as the noise would have made my downstairs neighbour miserable.
If you want a treadmill, you put it on the bottom floor of a house, using an anti-vibration mat. If you don't have a house, you don't get one.
In your case, you actually do have a house, so the answer seems really simple...
A garage isn't soundproofed for treadmill, so it doesn't create normal, acceptable noise. Move your treadmill and use your garage for a car or general storage.
Put the treadmill in your house, use it during the day and you're not doing anything wrong. The noise from a treadmill in a terraced house isn't going to be any worse than the sound of a washing machine, and that is acceptable neighbour noise.
(Unless you want to pay for expensive and potentially ineffective soundproofing measures to your garage to make it more akin to a room that gets used for people, not cars.)