My daughter sent me a Instagram post where a lady tells you where to go to find out if your pip award has been extended and you haven't received a letter. I did it yesterday and found out mine had been extended to 2030, you can then download and request a letter be sent out to you. For me this was a massive relief as I would have had to start the process this year, because has we know it takes a year for them to do it and then you have about a year and half before it all starts again because they backdate the award to when they requested the review not to the date the did it on.
Doing it is a bit of a faff, but it probably only took 10 mins, just seemed longer. The link is below for anyone who wants to check.
www.gov.uk/proof-benefits-state-pension Hope it helps x