Hey everyone, I'm a first year AuD student and I was wondering about a lot of this last year as I went through the process! In terms of getting an idea of how many students schools fund, ASHA EdFind was a solid resource. I will say that the information is only as recent as the last time institutions submitted reports, but it's still nice to be able to see. Definitely don't be afraid to directly ask program/admissions directors more specific questions, like what percentage of incoming students are offered funding, what form is that in (TA/RA, scholarship, government grant, VA, in-state tuition rate, etc.), do they have a limit as to how long they fund you, etc. I am blessed to be fully funded in the program I'm in now, but I will say it's the only program I got a full scholarship offer from (I applied to six schools) and I'm the only one in my class who received it. Another school of mine gave a scholarship covering half tuition, and then I spoke to the department chair more and she said she would be willing to hire me in her lab if I attended, and that would have covered another quarter of tuition. One school had fellowships/assistantships I could apply for in addition to applying for admission. Some were openly displayed on websites and others you kind of had to go searching for.
Sorry for so many words, but as you can see, there really is a wide range of ways institutions go about making funding offers. Half of my schools I didn't pursue at all after I got accepted, because they didn't have you apply for funding until after you committed or attended. Hope some of this is helpful!