Database
db={"accounts":[{"_id":ObjectId("63fdc0172cdd7833d01412fb"),"item":"Account Name","groupId":"VtofkqYIzcNR9NqwP7KB7Fuyuiw2"}],"utilityData":[{"accountId":"63fdc0172cdd7833d01412fb"}]}
Query
db.accounts.aggregate([{$match:{groupId:"VtofkqYIzcNR9NqwP7KB7Fuyuiw2"}},{$lookup:{from:"utilityData","let":{accountId:{"$toString":"$_id"}},pipeline:[{$match:{$expr:{$eq:["$accountId","$$accountId"]}}}],as:"data"}}])