Yes, US AWACS planes have been spotted over Romania and Poland which are 100% providing intel to Ukraine.
Also some large airplane refuelers in the same area. not sure if they are there for US planes or Ukrainian as well.
https://preview.redd.it/igsp0kljfek8...=webp&2262728f
Here is a refueler currently on its way back to UK. You can track his flight path
https://www.flightradar24.com/NCHO223/2af8796d