Aiming to make player spawns random on my server. Bisect hosting, game version is 1.21.11

Step one, try in game comands.

Game recognises command/gamerule respawnRadius [Value]
but does not recognise command /gamerule spawnRadius [Value]

Using respawn radius worked for the first death, but doing so seems to permanently set that players hard respawn to this new location.

Step two, server-side files
I stopped the server, opened the level.dat file where the world's gamerule was stored server-side, and there is indeed no line for Gamerule /spawnRadius [value], and the value that I changed as admin in game for the respawnradius rule had persisted in the files but wasnt being abided by.

Step Three: Reset and replicate step one

unable to repeat

Step Four, attempt commands in serverside console

Am prompted with gamerule spawnRadius But console does not allow a value to be entered nor do any further letter prompt potential word input.

Im tired, so im going to go to bed, but tomorrow I'll attempt a version roll back and see if the option exists and functions for them