Good News, I have found a solution! Went back to the owners manual and read thru it, then discovered a web page https://support.brother.com/g/b/manualtop.aspx?c=us&lang=en&prod=hl4150cdn_all and found a PDF under Network User Guide under my printer model HL 4150CDN. It describes how to change the settings in the printer menu to have setup configured for ETHERNET. It does use BRAdmin Light Utility. Instructions for both MAC & Windows are given. One method uses the TCP/IP method (that did not work in my case) so I moved on to the ETHERNET (wired network only). Made all of the necessary changes to operate in the ETHERNET setup and could not get anything to print. Shut my MAC Studio down (powered down) and turned off the printer. This just happend to be around 1:00 am. Got up the next morning, booted my MAC Studio up, then turned on my printer. Then tried to print a document. Good news, the document printed just fine. Further investigation suggested that you must give your system & printer time to negotiate the process, it does not happen immediately after changing configuration is the two devices.
On another note, I also have a Windows PC, that now cannot print on the Brother. I suspect that I will have to go thru the same dance with the Windows device to recognize the printer thru the same ETHERNET process.
Thanks to all of you in the community that responded to my issues with my macOS27 upgrade!!!