Seedling nutrients

I don't think that's a problem tbh. But then, anything with coco and perlite is foreign to me (except for germination) as I use super hot dense clay, which might buffer significantly better (which I amend with super phosphor, 5-1-5 npk, epsom salts, calcitic lime, etc)...

You can get away with transplanting auto's. If they are already in I wouldn't dig them up again and just let it do its thing.

Also, they are autos. I considered taking them out since they’ve only been in there overnight. They don’t like transplanting right?

Might be just a tad to hot. You could always start it in a smaller pot with different soil that'd not as hot and after 10 days transplant it.

If you’re literally sowing seeds right in it, probably a bit on the hot side. I’m not as familiar with organic nutes, should be a bit more safe than inorganic salts. This mix would probably be good for beyond the first 15-20 days. Healthy seeds contain the necessary nutrients to get them thru germination and the first 5-10 days. I’d have just run with that happy frog on its own for the first few weeks