Switch have sold more then the PS4 in the US and is now the fourth best selling home-console in the region, only behind PS2, Xbox360, and Wii.

https://twitter.com/stephentotilo/status/1525099994717601795?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1525099994717601795%7Ctwgr%5E%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.nintendolife.com%2Fnews%2F2022%2F05%2Fapril-npd-switch-has-overtaken-ps4-sales-in-the-us

The Wii will be Switch's next victim.

It's gonna eat them all up.
By the end of this year the Switch should have reached the Wii.

What are the US sales of the PS2, Wii, and 360? I have no doubt the Switch will pass them sooner or later!

According to Welfare PS2 is at 46.4mil, X360 at 43.2mil, Wii at 41.7mil, DS at 53.5mil and GBA above PS4.

Well deserved.
So what are it's actual US sales? Platform totals lists has it at 39.49m for all of North America, though I don't know how up to date those numbers are, and they include Canada.
At any rate, if we go by the platforms totals numbers, Switch looks likely to overtake both Wii and 360 by the end of its lifespan, which is no mean feat as those consoles both had gargantuan sales in the US.

Definitely possible it becomes the best selling console.