According to the search results, the rare McDonalds Monopoly pieces for 2022 are the same as in previous years and are as follows:

• Dark blue: Mayfair
• Green: Bond Street
• Yellow: Coventry Street
• Red: Strand
• Train stations: Liverpool St Station
• Orange: Marlborough Street
• Light blue: Euston Road
• Pink: Northumberland Avenue
• Brown: Old Kent Road

These rare stickers are much harder to find than the common ones, and if you manage to find one, make sure you keep hold of it as the remaining stickers in the set will be much easier to find, giving you a good chance of winning the prize for that set.