@Mudasser ******
It clearly states extension of stay is granted up to 14 May 2023 (60 days from 15 March 2023).
It states clearly you have to leave the Kingdom within that time period otherwise you will be prosecuted.
It advises you to obtain a re entry permit to preserve the permit.
And to report every 90 days.
So it would be prudent to obtain a re entry permit (1000 THB) by filing a TM-8 with Immigration before you leave and return to Thailand to start the process again.