I only took a quick glance at your lists and found a few that you might not have read ╮(￣▽￣)╭
How to Reject My Obsessive Ex-Husband - Esper and guide system in an isekai! He's an ass at first but he gets better.
Evangeline's Sword - You can clearly tell the two of them would do anything for each other
A Way to Protect the Loveable You - This one is so beautiful with a rare plot and mutual pining from the get go.
Unordinary - Okay, admittedly they're not official but it's SO heavily implied that these two mean the world to each other, which becomes so much more heartbreaking in the later chapters
awwwn you are so sweet (づ￣ ³￣)づ thanks a lot
Guysss I need stright webtoons with Yearning I mean YEARNING ML pleaseeeee be it Isekai or Modern romance does not matter. I have read trendy and popular ones alraedy so the underrated gems would be betterrr. thankss (๑•ㅂ•)و✧