With more fields like vmid, name & node:
export mypool="pool1";pvesh get /cluster/resources --type vm --output-format json |jq '.[]|select(.pool == env.mypool)| .vmid, .name, .node' | tr -d \" | awk
'NR%3{printf "%s ",$0;next;}1' | column -t | sort -k1 -n