Hi ,
If you have a pin configured on the Microsoft account you are using on the 3 machines, if so, deactivate the pin, just keep the password and do this configuration.
Go to the start menu > settings > network and internet > ethernet or wifi network > select Private mode.
Then go back to the previous menu and select advanced network settings > advanced sharing settings.
Mark Network discovery File and printer sharing.
In the Tab all networks Check Share public folders.
Uncheck Password protected sharing.
All that has already been done.
Give feedback if the information was useful or not.
Thanks