pip mandatory reconsideration letter received too late to appeal

hello,

a young person with autism was waiting for the results of a mandatory reconsideration for pip

pip was contacted for a update and he was told that the letter had already been sent and has he had not received it they would sent another one out to him

the new letter arrived but the date on there is dated the 4th of may 2025 and it says on he letter that he needs to appeal within 1 month of that date. so he is 3 months too late to appeal.

he cannot understand very well how to contact pip to find out what he can do and he has no one to help him where he lives

i would have thought if they resent letter because the first one was not received that they would have put a new date on it? but i dont know how these things work

has he lost his chance to appeal. thank you