I don’t know if that specific option is a scam, but I highly recommend going to an actual allergist. I went and did the skin tests but didn’t get much in the way of reactions, so they did a blood test and found a lot more allergies that didn’t show on the skin. From what I understand you can ask them for a full food allergy panel and they would test for the usual suspects, plus any they/you want to add in.
My sister did the blood test and found tons of food allergies she had no idea were issues for her.
Worth trying with an actual specialist who can tailor to your needs (and local allergens!)
From US, but I took a trip to Europe last month and used the Seek app which identifies plants and animals from pictures you take. It worked just as well in Europe as it does in the states. You can also use Seek and iNatutalist to see nearby species.