I fired up SSHDroid using Android 10 for the first time, and quickly noticed a warning that the app was not made for Android 10, and might not work correctly. I was happy to see that it did work as the daemon fired right up and I ssh'ed in without issue. I tried getting to my pictures area on my phone so I could back up some of the original raw files. I was greeted with an "Access Denied" to /storage/emulated/0/DCIM/Camera area. Unfortunately SSHDroid is not allowed access to the /storage area anymore in Android 10. Now to find a way to get to my raw picture files.
It seems that SimpleSSHD is not being updated any time soon, and for that matter does not even show up in the Google Play store anymore, I wanted to see if any other sshd programs for Android allowed access to the photos area of the phone. The one that seems to allow this that I found is SimpleSSHD. Upon first startup it asks for access to media which includes photos and videos. I proceed to start up the sshd server and ssh in. I was able to access the /storage/emulated/0/DCIM/ area with my photos. SimpleSSHD works great. I don't see any way to give the dev some money by buying the app, or in app purchases, so I guess I'll just say thanks for making a great sshd app that works on Android 10.
UPDATE: Since using SimpleSSHD last seems a few things have changed. There is no root login anymore with a default password. Dynamic root passwords are generated and displayed on the SimpleSSHD screen every time you connect. So I ssh'ed in the first time from a machine, and made a new file in the home dir you land in called "authorized_keys". There is no vi or vim or nano so I just put in my ssh public key using echo like "echo 'YOURKEYHERE' > authorized_keys". I did find out unfortunately that it does not support elliptic-curve signatures keys (ED25519). So I had to break out a old rsa key to get it working. This is not the developers fault. Dropbear does not support these types of keys yet.