Hey Jas90, if you transferred an ISA from a different provider to your flexible Freetrade ISA, any withdrawals you made from the Freetrade ISA following the transfer would be treated as having come from a flexible ISA. Whether a withdrawal would be counted towards your annual allowance or counted as a “flexible withdrawal” would depend on how you’ve used your Freetrade ISA so far this tax year. I hope that answers your question!
As always, this is not tax advice and if you need advice on your personal circumstances, please speak to a professional adviser.