toilet flange tilted and lower relative to level tile surround
If the flange is not that off-level then the wax ring can compensate. The trick is determining that the gap between the toilet bottom and the flange is not too great. Incidentally the toilet bottom should not actually touch the flange, i.e. there should be "some" gap to be filled by the wax ring.
If the gap is too large you typically you get a funnel shaped piece that you insert into the drain pipe with a wax ring under it (for odor sealing) and a wax ring above it (as the normal wax ring under the toilet).
You need to test fit the toilet without the wax ring(s) and decide on all the pieces needed before doing the final assembly. If you have to remove the toilet after you used a wax ring, you need a new wax ring.
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.