There are a number of companies that will pay cash for rights to some periodic payment you’re entitled to, including lawsuit settlements and lottery winnings. See, for example,

But a pension is a lot trickier - the value of your pension is typically related to your life expectancy. To make it sensible for someone to buy out your pension, you would have to convince them that you’re in good health and likely to live to at least average life expectancy for someone your age. But, if you’re a good health risk, why do you want someone to buy out your pension? You would expect to collect more money by keeping the pension and collecting the monthly payments.

I suggest you forget about trying this. The trouble and hassle of finding a buyer are almost certainly more than the deeply-discounted value of any buyout offer you’re likely to get.

There may be but you would be very foolish to seek such a buy out. You will get next to nothing for it. Maybe as little as 25%.