Can I activate my NON-O visa if it gets approved after I enter Thailand on a visa exemption?

The user inquired about the timeline and implications of their NON-O visa application, which has been pending approval for over 20 business days. They are concerned about the impact of leaving Thailand on a visa exemption and whether they can activate their NON-O visa upon re-entry. A commenter confirmed that they could exit and re-enter Thailand by presenting the PDF of the approved visa upon returning, which should allow them to receive a 90-day entry stamp.