I don't think probation is functional anymore
When I first made my account I believe I posted within the first couple days. Never had a learner icon either.

Just checked. It was the day after.
(8to12WeeksinScottishRegion Listening to Fur Q - Uzi Lover, Fri 31 Jan 2025, 21:27, archived)

Then that would explain why there are so many being made.

( Dave Trouser ; the people's choice - 75% agree, Fri 31 Jan 2025, 21:31, archived)