Just let the chips fall where they may. If you want to be 190lbs, then get there. Don’t let the meet dictate what your weight should be. This is your first powerlifting meet. Just make sure you get all your lifts, and have fun. I don’t see any benefit to cutting at this point.
If you enjoy powerlifting you will have plenty of time in the future to cut for competitions. This meet is supposed to be a fun learning experience, and chances are you will be stressed enough with pre meet jitters. the last thing you need to worry about is cutting enough weight, and then hydrating/carbing back up.
You will have enough to worry and be nevous about with your first meet. No need to add a cut on top of that. ESPECIALLY if you are gaining now and are planning to be bigger in the future. There is no need to put the brakes on progress this far out from your meet just to fall under some arbitrary weight class limit that likely will not effect your placing one iota.