Intune wipe only activates Windows Reset function which is built in and that deletes personal files. To deep dive in that, you need to understand, what Windows Reset really does.
Another topic, HDD and SSD wipe are different, even if you initiate that from Bios. You are right, SSD will be ruined if it would be written each block several times, so actually SSD is cleaned only by erasing the beginning block and ending block, so the data cannot be accessible by any recovery. I guess data read in SSD and HDD are that different.