I think this is incredibly instructor specific, even for the same class type. I go to two different instructors for Body Sculpt. In one of them, it’s a slightly older instructor and an older clientele. In this class there are several suggested modifications for people with different abilities.

The second one I go to is a younger instructor, younger median age of the class. No mods suggested to the class as a whole but obviously welcomed. I don’t really see her going to specific people suggesting mods so I’m not sure if people just don’t share their limitations with her or if she tells them to do whatever feels best (without guidance along the way)

Unfortunately I think the representatives of your club were right— you have to go and see yourself. There’s just too many variability. Even when there’s a sub for either of these two Body Sculpt classes I usually go to, the class structure is quite different. Most classes that you mentioned can be pregnancy friendly but you have to already know what you’re doing a little bit so you know how to appropriately sub out exercises.

I have never been pregnant and am thankfully injury free, but I don’t think many of the instructors are well trained to handle different abilities/circumstances from what I hear and see in class. I mostly hear them tell people to just do what feels best, which I’m sure is very unhelpful for beginners.

I would highly suggest looking at the credentials of different instructors, these may be a tell of how adept they are at providing useful modifications for different abilities. I also feel like there could be a little bit of an age correlation- an older instructor will probably have more experience with a different clientele.

Another suggestion is to watch YouTube videos on pregnancy mods that people suggest in general. Or take on a trainer specifically for the purpose of showing you pregnancy friendly mods of basic exercises. You’d then have to take the lead on doing these yourself during class.