haven't signed in here for an age but couldn't stay away bc i have to ask for this to be made 1.16.4 compatible if it already isn't and if it is let me know that... i tried to edit it myself, well i looked at the functions and didn't understand them well enough to shoehorn it myself. thinking this would work well with a random spawn (per player worldspawn) with adjustable range.
i'd like to have a player spawn at a random pos when first logging on a server and have that set so they spawn around there again on death (unless slept in bed).. atm i'm looking at adding 2 datapacks to handle this.. if you suddenly fancy having a pop at doing this may i suggest also having the nether pos linked in the similar way for nether starts and deaths :P