At Sq - 0.95% until 50k, see table in post below.
Even if it’s directly for buying an ETF, the fee is due.
At least the interbank rate is used though.
I’m not aware of any way around it, via Transferwise may be an option, I just don’t think anyone has mentioned that which makes me assume there’s a catch. Tw is not free for a start and does also cost approx 0.5%.