you said “it's not immigration its when you check in they need to input the flight details when your leaving or you will be denied boarding.”
This is absolutely not true, they do not check nor care about your exit flight details. They might ask to satisfy the thai immigration requirements but it doesn’t go past a casual glance on whatever medium you’re supplying to them.
I almost always come on visa and even the couple times ive come on exempt i’ve never had to show onward travel, if anything its a casual ask how long my trip or my plans are.
neither is the person who made the comment you replied to and tried to correct with also incorrect info. Seems silly to try and correct someone when you’re not correct either 🥴
You replied to a comment about needing to apply for a visa in the country you reside in saying thats only true for METV visas, to which i replied its not only METV but evisa’s as well, which can be TV or METV
some embassies might want accommodations for your entire stay but they will tell you and let you add as needed, in which case just book something cancellable