sorry, forgot to mention, I do have a lawyer in my case, but I did all of this research myself. The lawyer filed under C31 initially, that's what delayed the EAD in the first place. Please google "expedite criteria uscis" to see the reasons that USCIS might consider to expedite any petition that doesn't have premium processing. I framed my EAD expedite request based on the expedite criteria and sent it through senator's office.
Thank you for your insight, Restez Forts.
Humanitarian reasons: I am frontline healthcare worker for COVID response, got letter from employer regarding this.