So I have a severe peanut allergy and am allergic to some other nuts, fruits, detergents but have never had any allergies related to injectables. When I told them this they just had me wait under observation for 30 min instead of 15. I also took my epipen to make me feel better but they had a bunch them their with the paramedics anyway.

More relevant to you, a family member of mine has a history of anaphylaxis from injectables (media die used in MRIs). I asked the nurse about this when I got my second moderna dose and she said they were really only concerned about people with allergies to PEG (polyethylene glycol) or polysorbate which are used in the vaccine creation. For all other allergies they just have you wait the extra 15 min. Just be honest with them and they'll set you up for increased observation, where I got mine they even had chairs way up front marked off for higher risk people so you're sitting like 8 feet directly in front of the paramedics, it's super safe.

One important note, they won't administer the vaccine to anyone with a history of allergies at one of the drive in locations, it has to be a walk in so make sure you make your allergy clear where you sign up or if you talk to someone so you get slotted to a walk in location

Last note, if you are still concerned you can ask a Dr about taking preventative steroids or anti inflammatory meds leading up to getting vaccinated. My family member went on prednisone leading up to their last MRI procedure and he was able to have the media die that sent them in to anaphylaxis years ago injected with no reaction this time.