db={carts:[{"_id":{"$oid":"62af0fefebc0b42a875c7df1"},"uuid":"6ca05ae0-522a-4db3-b380-2d2330ee1e27","cartitems":["62a0b24680cc2891148daf7b","62a7339d91d01868921afa0a","62a72f7191d01868921afa08","62a7330291d01868921afa09"],"created":"2022-06-19T14:00:47.846958537+02:00[Europe/Brussels]","lastupdate":"2022-06-19T14:01:06.15165564+02:00[Europe/Brussels]"}],products:[{"_id":{"$oid":"62a0b24680cc2891148daf7b"},"name":"Product1","created":"2022-06-11T09:41:54.461308647+02:00[Europe/Brussels]","category":"Workshops","pricein":"28900","lastupdate":"2022-06-17T16:09:53.385655474+02:00[Europe/Brussels]"}]}

db.carts.aggregate([{$match:{uuid:"6ca05ae0-522a-4db3-b380-2d2330ee1e27"}},{$lookup:{from:"products",let:{cartitems:"$cartitems"},pipeline:[{$match:{$expr:{$in:[{$toString:"$_id"},"$$cartitems"]}}}],as:"output"}}])