Jesus you were here during covid and asking how to stay longer, Don't you think it's time to go to another place for a while your choice , but you will be denied sooner more than later.
if you going to do a few trips travel light and load Ur suit case up you will get 25 kg a suitcase free and they are rarely checked Thailand end , but that's from my own personal experience.
I shipped 8 boxes of personal effects total 130 kg to Thailand last July mostly photos and nick knacks belongings of my parents which is irreplaceable, got raped by customs , so be prepared to pay when it arrives they don't give a rat's.