U4924DW, unable to turn on daisy chain support?

I'm trying to daisy chain my monitors with my U4924DW as the main screen, and connecting via DP 1.2 through to another iiyama screen that supports MST.

I cannot find the setting on the Dell where it allows me to turn on MST?

I'm using a MacBook M3 Pro and my work machine is an M2 MacBook. I know there might be limitations, But I don't know why its not working?

If I use the iiyama screen as my main one, the dual screen works in extended mode. I can't even get that far with the Dell as my main monitor, How can I get the setting in the OSD Menu to turn on MST?