I'd wonder why purchasing support materials aren't company approved.
Do they not support membership/subscriptions for their professionals?
I'd go ahead and purchase it on your own.
You can then turn in a reimbursement request - or itemize it on your taxes, if that is refused.
I had to do that for a couple years before I convinced my employer to pay.
Unfortunately, in answer to your question, it seems a lot of professional support meetings met their end during COVID.
There used to be a Kronos PNW Healthcare group that met every 6 months, which ended due to COVID.