I doubt a rocker table would fix a saddle issue that starts after 40 minutes.
On the off chance your soreness is on your sit bones you may well acclimatize to it after a few rides. I wouldn’t be pushing it though. Take a break before it’s super sore.
Does it feel uncomfortable before it reaches the “super sore” stage? That is the feeling to focus on for fitting it. Simple step 1, make sure you’re sitting on the saddle properly putting your sit bones in the right place. If it’s uncomfortable there then it may not be the right saddle for you.
Pedal for a bit and see if you shift position subconsciously, if so that’s probably the issue. Move the saddle so you can sit on it properly whilst pedalling.
There’s a chance that the increased amount of sweat indoors is making you more sensitive to chaffing. Quality of bibs might affect that too. I have 2 pairs of bibs, one are the good value for money DHB that wiggle used to sell, the others are more expensive assos ones - and the difference is palpable.
It depends where the pain is. If your saddle is pushing into soft tissue most of the stuff that people advise better bibshorts, creams, “move around, stand out of the saddle” are not really fixing anything they’re just working around a bad fit. If you were saying “after 6 hours I’m uncomfortable” sure, but 40 minutes? Your saddle should be comfortable for 40 minutes or, as you say, a couple of hours as is. If you ride across america YMMV.
Typically saddle issues usually point towards a saddle that’s too high rather than too low - but being too low creates issues too.
Saddle position is slightly complicated by having to consider fore/aft at the same time as the height. Simply put, moving saddle up is similar to moving it back and similarly moving it forward is similar to moving it down.
Try to find the right height and then consider if you can sit on the saddle there, if not then you can start to move the saddle fore/aft and height together to keep the same effectively leg length but without having to sit on the nose of it, or off the back.
I’d do biggish sustained power to test even if it feels good with easy pedalling. The fitters will get you pedalling relatively softly but they can see all the angles and some of them have saddle pressure mapping too - and they can tell from that the problems you’re likely to have. e.g When you’re trying to fit yourself the easiest way to tell whether your quads are going to burn because your saddle is too low or forward is to do a seated sustained effort above threshold and see if they burn.
Be aware of the fact that, if you get off the bike, adjust the saddle and get back on it will generally feel better than it did when you stopped because it was sore no matter whether you moved it to the right place or not. i.e if it takes 15 minutes until your knee starts to hurt or your saddle is uncomfortable then you need to test for that length of time. This can be really frustrating and you can waste a lot of time getting off, adjusting, riding for 5 minutes, getting off again, repeating trying to make a bike comfortable.