Planning on leaving June 2023 , u are asking NVC to delay the interview too long
the medical for a june visa expiration would have to be done in January 2023 as the visa expires 6 months from the medical exam
you can only delay NVC AOS and ds 260 documents a year
NVC recd your case 2/25/2021 so the year will be up in February 2022
I would file all and cancel (if needed)
BUT this is on USCIS site
https://www.ustraveldocs.com/vn/vn-iv-reschedulevisa.asp
Can you delay visa interview?
You may only schedule a new visa interview appointment if you missed your previously scheduled immigrant visa interview appointment. If you schedule a visa interview appointment before the date of your initial immigrant visa interview appointment or meet any of the conditions below, you will not be interviewed.
Keep in mind the queue is long for Philippines and u may be waiting (in your needed timeframe) just to get the interview