Just look over the "Disqualifying Conditions" on the FAA website. VA disability claims that don't flag a disqualifying condition are usually OK and even then can be waived. If you have back, neck, knee pain that reduces your range of motion...those all contribute towards a disability rating but won't impact the FAA medical.

Common things that people claim like "sleep apnea" give 50% but then you have to document treatment etc. PTSD seems to be on the rise as well and requires additional testing etc but people are getting 1st Class certificates.

At a minimum get evaluated and get a 0% rating. That alone eliminates VA funding fee on home loans.