Ok long story in problem solving, the port is only USB-C, but I found none of the Samsung mobile, tablet USB-C worked with the monitor at all.
So I tried USB-C IF type cables, then Thunderbolt 3 and 4 from Spigen, then I swapped to Cable Matters, link below, excellent only minor issues which again is Samsung hardware.
Cable Matters [Intel Certified] 40Gbps Thunderbolt 4 Cable 1 m with 8K Video and 240W Charging - 1m - Backwards Compatible with USB4 Thunderbolt 3 Cable and USB C
https://amzn.eu/d/4mEHGOB
Regards, Obsydian
DAILY DEVICES
ZFold4 [Mobile], Pro5 [Watch], S8 Ultra [Tablet], Book2 Pro i5 5G [Laptop], Buds Pro2 [Buds] M70A 32/43" [Monitor], Smart Tags+, iPad Mini 5 and iPad Pro 12.9 GEN2 [Tablets], Dell Inspiron G5 Laptop
HOUSEHOLD DEVICES
ZFlip3 and ZFlip4 [Mobile], Watch5 40mm and 46mm [Watch], S7+ and S6 Lite [Tablet], QN95A [TV], Q900A [Soundbar], MC28M6075 and MC32K7055 [Microwave], Jet 75 Complete (Vaccum), Samsung Level [Speaker], Buds Pro [Buds], iPhone 12, iPad Air 2, Air tags