Update made in 2025-01-22 Nevermind Canva, they need both (top tone + Nikhahit & Nikhahit + top tone) If it's only top tone + Nikhahit, the ligature will not show up.
Loop:
Update 2024-07-22
My current Thai Loop feature file has the additional glyph.left tone-mark to prevent tone-mark crash with ใ ไ โset
Loopless: Update 2024-07-22