Mobility Component of PIP and Pensioners

I voluntarily asked for a PIP Review as my Arthritis has got much worse. I answered all the Daily Living questions with my change of circumstances and also the Mobility Component questions as my walking distance has been greatly reduced because of my condition. I have just received my AR1 Review notification and I have been awarded the Enhanced Rate for Daily Living instead of the Standard Rate - a much welcomed increase! However, my Mobility Component hasn't been reviewed - As mentioned above, my walking distance has been greatly reduced, so I applied for additional points above the 4 points already rewarded (for being able to walk between 50 to 200 metres) to being only able to walk approximately 20 metres on a good day - to below this on a bad day. The reason given was the DWP cannot legally change the Mobility Component for someone over 65. I am 70. is this right? Now here's the annoying part. I had a Motobility Car for 15 years years under the old DLA Scheme-Enhanced Rate, but on conversion to PIP in 2017, I had the car taken off me as I couldn't achieve the Enhanced Rate of Mobility just as I was about to turn 65 (one month short of my birthday). A Mandatory Reconsideration did help slightly, but only gave me 4 points from the previous 0 points - still not enough for the Standard Rate. Having a new car is actually not required now, but the Enhanced Rate, or even the Standard Rate would be handy at my age these days. Why am I excluded from being able to achieve this now? Is it age discrimination? Any help and advice would be much appreciated.

Hi BIS, surely it is State Pension Age??? - which is 66 or older for some people eg us WASPIs [Women Against State Pension Injustice]. Please confirm.
Thanks,
Denby

Dear Barker,
I am 75 approaching 76. I am in receipt of DLA indefinitely for the High Care component but I can only ever get low mobility component. I am lame now and my mobility has greatly decreased. I can only walk with a stick, in fact need two sticks, but because I sometime carry things, with great difficulty, so I tend to use just one.
Am in constant pain when I walk because post traumatic osteoarthritis in my ankle from a fracture. I have a brace from the hospital on my ankle. Also had a knee replacement in 2017.
Yes, it would be nice to be able to get a higher mobility rate, and disappointing that us older disabled folk do not get it. I understand that Attendance Allowance does not even have a mobility component at all.
T.B.H. just glad to get the amounts that I do get.
I do have a blue badge though which I can use in a friend's car, but mostly use it in my son's car when I go to stay with my him.
I also get funded through my local borough for a London taxi card which is quite useful. If and when they do turn up