https://blog.playstation.com/2021/04/19/playstation-store-on-ps3-and-ps-vita-will-continue-operations/

Sony finally found out that they were making the wrong move and decided to keep PS3 and PS Vita stores open!
Unfortunately, PSP store will still go down by July 2, 2021.

EDIT: The 35 PSP games that will be taken off the store by July -
https://www.videogameschronicle.com/news/updated-analysis-35-psp-games-will-disappear-when-sony-closes-its-store/

EDIT 2: 23 of the PSP games to be removed are exclusives, what's worse, most of them are only available digitally...
101-in-1* (Not sure if this is an exclusive)
Ape Quest
Beats
Black Rock Shooter – The Game
Cho Aniki Zero
Cladun: This is an RPG!
Creature Defense
Dissidia 012 Prologus: Final Fantasy
Hot Shots Shorties Blue Pack
Hot Shots Shorties Green Pack
Hot Shots Shorties Red Pack
Hot Shots Shorties Yellow Pack
I am an Air Traffic Controller Airport Hero Tokyo* (Kinda skeptical about this one)
Kurulin Fusion
LocoRoco: Midnight Carnival
NeoGeo Heroes: Ultimate Shooting
No Heroes Allowed!* (Might be on Vita too. Not sure though...)
Patchwork Heroes
Savage Moon: The Hera Campaign
Susume Tactics!
Talkman Travel: Paris
Talkman Travel: Rome
Talkman Travel: Tokyo

I think that list wrong. Most of those games should be purchasable on the Vita. I don't see why Sony would remove them from sale when the PSP store disappears. There is however a different set of PSP PSN games that are exclusive to the PSP store. Most but not all of those have a UMD release.

https://en.psprices.com/region-us/games/?platform=PSP&sort=name&ordering=asc

Here's a list of some of those I made last night. These were just games that interested me but there are more if you look.

- Capcom Classics Reload
- Capcom Classics Remixed
- Daxter
- Gradius Collection
- Gran Turismo
- Midway Arcade Treasures Extended Play
- motorstorm arctic edge
- need for speed prostreet
- need for speed shift
- pursuit force: extreme justice
- puzzle chronicles
- Ratchet & Clank: size matters
- rengoku: tower of purgatory
- rengoku 2: stairway to heaven
- sega genesis collection
- silent hill origins
- socom fireteam bravo 2
- socom fireteam bravo 3
- super monkeyball adventure
- the king of fighters collection
- thexder neo <-- PSN exclusive
- tomb raider anniversary
- tomb raider legend
- unchained blades <-- PSN exclusive
- wipeout pure

Ohh sorry... For me it shows an error page when I find the link to games so I wouldn't know. Thanks! These games are playable on other platforms as well though...

My list is PSP store exclusives on PSN. If you want to play them on your PSP digitally you must purchase them before the closure. Most other PSP games should remain purchasable on the PS3 / Vita stores. It seems likely you would then be able to download them to your PSP if so desired.

PSN is a great source of cheap games. Prices have really gone up in recent years for certain titles.

Good news for game preservation, but it's still a band-aid that will be torn off eventually. There's just no changing the fact that digital stores on a closed system have a limited life expectancy.