Yes, though you might need to include https:// or http://.
If it doesn't work, try downloading a different mobile browser (brave, duckduckgo, etc.).
You might get a "warning" page. Just click through.
If you haven't already, start using a unique password for any pages where you might need to "backdoor" (really just bypassing DNS), as it could be transmitted via port 80 (http) which is unsecure and has no SSL protection. As such, any password you use via this method is potentially subject to being seen in clear text.
I recommend bitwarden for a password manager; some will say LastPass. If you want to go through the rigmarole, keePass is also ok, but has no cloud support unless you store the database somewhere like dropbox (at which point you might as well have made use of bitwarden's encrypted cloud architecture, imo), you can only use it on one device OR have to manually update each device every time you mod a password or entry.