All the major/high level Sector ETFs and Commodities ETFs

For example, $XLU is a utilities ETF. Commodities need to expand from just gold and silver, such as oil, copper and so on.

Requesting non-UCITS ETFs is pointless, as they can’t lawfully be promoted to retail investors without a KID, which none of these US ETFs have.

I would suggest looking for UCITS ETFs traded on the London Stock Exchange in GBP/GBX, as those are the only ones Freetrade is carrying right now.