You have two popups in your image. The background one looks like a marketing ad. The foreground one is a notice that your installed Norton Utilities Ultimate, NUU, has a pending updates. As you have NUU already it is not an upsell.
( IF, you have it installed already )These appear to be alerts there are updates to your Norton Utilities product . My understanding is that you DO NOT have NU installed. If the latter is the case, these would be in my view marketing sell-up notifications. I also have Norton 360 Deluxe running on Windows 11, I have NOT seen anything appear such as you are posting about to date. I also don't have Norton Utilities installed, so should this appear my side I would consider them sell-ups. And dismiss them.
There are many different notifications Norton uses to drum up additional business. Offering an additional 3 months to your current subscription is one. We can take a look at what you are seeing and help.
The only upgrade you can receive from N360 premium 1 is to N360 Platinum. The only difference is that Premium is for 10 devices and Platinum for 20. If you want to protect more than 10 devices do it, if you have 10 or less devices it is not necessary.