Why is Linux giving a pts number for real terminal console? (which is not an emulated terminal like ssh or xterm)

I read that pts is a pseudo-terminal (that we get through ssh or xterm) and tty is the native terminal. I didn't connect to my PC through ssh or xterm, but I am still getting pts/0 and pts/1 when I type who command. When I open other terminals, the number of pts's increase.

username@machine$ who
username tty7         2020-12-30 11:39 (:0)
username pts/0        2020-12-30 11:39 (:0)
username pts/1        2020-12-30 11:53 (:0)

I am not getting why this is happening, shouldn't there be more tty's after opening other terminals? Also, when I do su I see that other pts session gets opened for root in auth.log file.