By the way I would like to add a crucial information, from 2023 experience with my METV (Multi-Entry Tourist Visa)
When I had METV in 2023, and I did a crossing from Laos to Nong Khai to start my 1st entry on METV (I received the METV when I arrived in Thailand already as I entered on visa exempt, and 15 days later I received on my email the METV)
So, I went to Laos FB1 & go back to Nong Khai, in the minute, I put my E-Visa Paper on the desk, but the IO, didn't look at it almost ! and he stamped me right away the TR60 stamp on my passport, so after this, I though he just see my visa on the database as I guess it's linked directly with the data of the passport, & the visa.
But what is more amazing, is when I used to use the another entries of my METV by arriving in SVB airport on the next times, the IO always looking and reading the E-Visa paper carefully, & scan the QR code included in the visa paper on his machine.. which it was pretty different than the land border crossing. So for me it's really wondering how their system work..
Just a supposition, maybe he look the number of the visa on the TM6 form.. and put this on his database and find out the visa. (while crossing on land border in FB1)
Also entered once this year in SVB on visa exempt, the IO, asked me, do you have visa ? I said no.. he said, what are you doing in Thailand ? I said just travel around Asia, then looked my stamp for a minutes, & finally stamped out for 30 days.