It seems that it doesn't support 8.X?

I can create links correctly, but when I insert data, it returns "mc_topology get_pool error:{error,timeout}",and,I tracked and found that the printout "#mc_server{pid = <0.293.0>,
mref = #Ref<0.1887262881.3158835201.202218>,
host = <<"localhost:27017">>,type = unknown,me = undefined,
old_rtt = undefined,rtt = undefined,setName = undefined,
setVersion = undefined,tags = [],minWireVersion = undefined,
maxWireVersion = undefined,hosts = [],passives = [],
arbiters = [],electionId = undefined,primary = undefined,
ismaster = undefined,secondary = undefined}]"
the mc_server's filed type is 'unknown',is this caused the timeout?

Start by reproducing the insert failure against MongoDB 8.X and inspect the `mc_topology get_pool` timeout alongside the shown `mc_server` record, especially its `type = unknown` field. Done means determining whether this driver supports MongoDB 8.X and documenting or fixing the cause so inserts complete without the timeout.

Written by the indexing model from the issue text.