Problems trying to dual-boot on a Beelink N5095

I currently have a Beelink N5095 with Windows 11 installed on the 128GB nvme card and Lubuntu installed on the 500GB SSD.

I want to be able to dual-boot but I cant get it to work and so I can only choose which one to load by altering the Boot order in BIOS

I have tried various tips on the internet but nothing seems to work.

Has anyone got the same set up and managed to get it working?

Thanks in advance

ScrabbleKi How to Dual Boot Linux and Windows on the same hard drive:
, please check the tutorial

I’ve installed it on separate drives but have still followed the above instructions but I dont get the dual boot menu

UPDATE: I altered the UEFI boot settings and it now works.