What's with the tickets to Wembley?

Hi!

Just curious if there's still a way to get tickets for the euro cup matches at Wembley. The uefa website doesn't say anything. I know people who purchased it for last year get a priority, does that mean there are no new tickets to be had?

Sorry if this isn't the right place to ask this. I'm new to London (recently moved) and don't know anyone/anywhere else to ask.