Hi Chdsl, thanks for taking time to reply. I had already tried killing touchbarserver, both in Terminal and Activity Monitor. I believe tochbarsever service is not even there to kill.
My Login Items is clear as I already did a reset of the device, and, also reinstalled Sonoma with no installation of any other 3rd Party apps (not even recovering a backup). What is on my MBP is plain macOS Sonoma standard applications. I am keeping it as pure as it comes to continue trying out options with no excuses of other software that I could have installed.
I am still tempted to clean HDD and install Ventura, to prove if it is Sonoma that is killing the TouchBar.