My questions is that ' is there any possibility that some point in time in future BTC community might decide something which can retrieve this lost BTCs?
The community is not built to retrieve any bitcoin for anyone, what is the assurance that the key to that bitcoin has lost as you said? There are people who have buy bitcoin for more than 7 years, they haven't spent a single sats from it, despite some soft fork like the use of native segwit address, they still prefer the first legacy wallet address to avoid chain surveillance from outing nose in their holdings.
If anyone do this, you are breaking the tryst if the community, it will even be impossible except you have some tips about that wallet address like some missing part if the private key or wallets dat.