I received retroactive benefit pay from my disability pension for half of 2018 , all of 2019 and 2020 in the year 2021 anyway to have it spread out on those years?

I was receiving disability and my pension, but I had an update form due for my disability and it was late so my retirement didn't get the info that I was still on disability so they stopped payments and it took me over 2yrs before I realized it, once I sent the forms showing that I was still getting disability they sent me a deposit for all the months missed, so I basically went from 19k 2017 , 9k in 2018, 0 in 2019, 0 in 2020 to 63k in 2021 . Please tell me there's hope

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