SFTP Clients that work with Files

[NMBob]

I still have Transmit, but it lives in its own universe. FTP Client Pro does too. Is there one that creates a download folder in Files so other programs can access the downloaded files? Like in my current case I can get a configuration file for a piece of equipment, but then I need to send it through a file picker in Safari. Those two clients keep things in their own area which doesn't show up anywhere, except in the programs themselves.
I hate iOS file management. It's so convoluted. We NEED iOS Finder.
Thanks!