Yes, even if she did drop some eggs she will still be able to spawn if shes interested. She just wont have as many as she could have had.
How much (if any) damage have they taken? From your description as long as there is not too much damage, if it were me, I would leave them in longer and consider bumping the temp to 82 maybe. I've heard of folks leaving them in as much as 2-3 weeks. I don't have that much patience LOL. By the end of 1-1.5 weeks Im at the end of my rope and will remove, isolate and recondition.
I'm definitely not "the" betta expert, I can only say what experiences I've had

Hope this helps!