Scrolling horizontally in a popup

[Salman Halim]

Hello,

I'm trying to scroll horizontally in a pop-up window that contains very long lines. I'm sure I've missed something simple, but trying things like (Vim9)

    win_execute(popup_id, ':normal! zH')

Doesn't work. I can execute other commands in the window using the above mechanism.

I'd appreciate any help. Thank you,

Salman