Samsung Galaxy S21 range will not receive updates any more

Samsung has ended all software support for the Galaxy S21, S21+ and S21 Ultra, five years after their launch in January 2021. The phones have now reached the end of their promised update cycle, meaning no more security or Android updates. Owners may want to consider upgrading, with the Galaxy S25 series expected to become more affordable as newer models arrive.

Source: GSMArena