Wi-Fi Direct Setup
Status = Enabled
Wi-Fi Direct Name (SSID) = DIRECT-f8-HP M203 LaserJet
IP Address = 192.168.223.1
Wi-Fi Direct Password = 12345678
Wi-Fi Direct Channel = 6
Connected Clients = 0
That's a breakthrough.
What you have to do next can be a little confusing. On your Mac's menu bar, click the Wi-Fi icon. There should be a network with the name corresponding to that printer's Wi-Fi Direct Name (SSID): DIRECT-f8-HP M203 LaserJet. Select it.
If you connect to that network, it will take you to that EWS page. You may be prompted for its password, which is also shown as 12345678. Once you can finally load that page, you should be able navigate through whatever options appear on it for the purpose of changing its IP address from whatever it is (192.168.223.1) to what I suggest: something like 10.0.1.100 would be a good idea.
While you do that, bear in mind your Mac will not be connected to the Internet. It will be communicating only with the printer. Nothing else.
When those changes are finally input, accepted, and applied (using whatever terminology it uses for "apply") you will then be disconnected from that webpage. In other words it will appear to become unresponsive because that page no longer resides at its previous address. The EWS page may or may not warn you that is what is going to happen, but when it happens, click your Mac's Wi-Fi icon again and choose your usual wireless network. That will restore your ability to connect to the Internet as you usually do.
The printer may need a moment or two to restart.
Then, you ought to be able to type 10.0.1.100 in Safari's URL field, and the EWS page should reappear. Or, at your option, you should be able to use the HP Easy Start program that could not find your printer last time.
If something goes wrong then be prepared to repeat all the above, come back here and post a reply describing your status.