CPAP and flying

I am flying from UK to Finland on Friday.
My understanding was that as long as you had a CPAP passport, it would be treated as vital medical equipment and not counted as hand luggage.
I'm flying out with Air Baltic, back with Ryanair, and booked the flights via OPODO.
Ryanair say they have to have 48hrs notice via their special assistance team. Is this only if you need to use the machine on board?
Spoke with Ryanair, who couldn't help as I haven't received flight numbers from OPODO.
Rang OPODOs customer service, where a robot told me that there was nothing a support agent could tell me that wasn't on their website.
Their website is a nightmare of circling back and forth, then being told to call customer assistance.
I'm tempted to just take my machine and deal with it at the airport.
I'm also worried as I have no flight numbers, no one has asked for my passport number, and despite emails saying I can check in, I can't due to the above.
Any advice greatly appreciated.