Life was so much easier when everything was 1 1/8…

Anyways, my mate has just bought a Pinnacle Iroko from a lovely chap on here. Think it’s a 2018. Ace bike. However, the top headset cup is quite tall, and he could do with a bit more stack so he can fit his EDC.
We’re trying to figure out what sort of headset it is and as we’re both old, we’re not down with every single version of the 10 billion current configurations.
Headset appears to be this:
https://www.evanscycles.com/pinnacle-ramin-iroko-xx44-headset-EV252520
Is that what’s known as a Straight 44mm HT?
If so, can you fit a ZS44 top assembly to it for looooads more free steerer? Because the top cap seems unnecessarily massive.
Ta!