How long does DTV approval take and what evidence is needed for the application?

Freetrade won't work, you need the funds in a standard bank account. You should also show your earnings via invoices matched up with incoming funds in your bank to prove your income. And if you are registered to pay tax or have tax returns include that

Use the group search tool with relevant keywords and start reading. Everything's been asked and answered hundreds of times.

I also have been traveling a lot and recently used London and it went through pretty quickly.

Not sure about the funds being on a separate platform though so would suggest they are in a bank account you have immediate access to. Also highlight on that statement any salty deposits or invoices paid to you.

Portfolio should be great but I’d suggest adding additional captures showing how you didn’t work. Screen captures almost like a story board of conception to completion with your website portfolio as the end product.

What embassy are you applying via? The length varies by embassy