IME of local dressage schooling shows, while levels themselves may run out of order (ie, First before Training) I haven’t really seen the tests within the levels run out of order. It’s almost always been Intro A, Intro B, Intro C, or T-1, T-2, T-3. Not at all the case at multi-ring recognized shows, but at single-ring schooling shows where most of the rides are Intro or Training, that’s been my experience.
Some schooling shows have started grouping a little differently since Covid just to let barns with big trailer loads all ride around the same time regardless of test and be done, space a few people in between the next big group, and scores are final at the end of the day. (I was in a random 4 person section of Jennifers Doing Training at one show last year, just to make rides work out ) But running totally out of order like that would make it even easier to accommodate your request.