I had to student teach secondary mathematics in october of 2020.
My host teacher was very up-to-date on online learning platforms (like pear deck and desmos) so i got to teach while learning these programs and making lessons with someone very knowledgeable with this. We also had 30% IEP students but also had a special education teacher so that helped a lot as well.
But otherwise most of the teachers were unprepared to teach themselves.
If you used manipulatives which i deem necessary to visualize fractions you were out of luck :(