Of course, it's even possible to touch type on a Nokia E55.
That was my favorite phone; I wish someone would make a modern version of it.
I used to do it on a Blackberry, which had an even smaller keyboard.
I think that actually is easier on a smaller keyboard, since you can reach the keys without stretching your thumbs. On this phone, you'll definitely be stretching your thumbs (on my iPhone 12, I can barely touch my 2 thumbs when holding the phone horizontally)
I have long thumbs so Blackberries were actually a bit too cramped for me to properly enjoy it. Touch typing was still possible, but less comfortable for me than on a side-sliding keyboard like the Droid line had.