N/A 55-60fpe compact .22

RTI Prophet might be similar to what you're after, they'll get a .22/25.4 over 1000fps pretty easily.
2nd this.

I have a P1 .22 20” CZ barreled Compact that with a mild 127bar reg setting and 22gr JTS pushed at 895fps for 39FPE Just bumping reg pressure 5bar would easily jump the FPE into the low to mid 40s with the same pellet.

So, yeah the P1. 50+ FPE with 25.4gr..easy peazy.

OAL is 30.875” with moderator 😄
 
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55-60fpe is a lofty goal for a .22 - I'm not sure physics makes it possible for sub-34 inch .22 caliber to get that FPE... "comfortably". Is it possible, sure, but it's gonna be working hard. Maybe prioritize either caliber (and be happy with 35-50fpe) or FPE (and be willing to step up to .25 or .30 caliber).
True, and I misread the title thinking the request was for a 25Cal lol.
 
55-60fpe is a lofty goal for a .22 - I'm not sure physics makes it possible for sub-34 inch .22 caliber to get that FPE... "comfortably". Is it possible, sure, but it's gonna be working hard. Maybe prioritize either caliber (and be happy with 35-50fpe) or FPE (and be willing to step up to .25 or .30 caliber).
My AirForce Talon SS (sans moderator) is 32 inches. Modified, a bit, 19 inch barrel, 1.1L bottle, Huben Power Cricket drop block regulator, Trajectron 90g hammer and heavy spring.

63J with Apolo Monster 25.4gr. Power wheel at 4, regulator at 2500psi. I'm guessing I could easily get 70+ J just by cranking the power wheel or upping the regulator pressure.

Screenshot_20250202_135930_Firefox.jpg
 
That what I get in a conservatively tuned K1 with AVS 36gn .293. Bought from Kelly. Fabulous experience
Where it's at is the Weight your able to shoot in K1's and a select few other Very high output PCP's. Most .22's will struggle to shoot a 25.4 gr in .22 with enough speed to make it worth while.
That output in .22 can be done & Is, it's just not that common among the .22 pcp's most of the masses are using.
 
My AirForce Talon SS (sans moderator) is 32 inches. Modified, a bit, 19 inch barrel, 1.1L bottle, Huben Power Cricket drop block regulator, Trajectron 90g hammer and heavy spring.

63J with Apolo Monster 25.4gr. Power wheel at 4, regulator at 2500psi. I'm guessing I could easily get 70+ J just by cranking the power wheel or upping the regulator pressure.

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My .22 K1 easily gets 55 or so FPE and my FX Dynamic Compact in .22 as well and more
 
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My Caiman X is easily short enough and easily meets the weight spec but I don't know about power. I have the reg at about 120 bar and it shoots 21 grain H&N slugs about 915 fps for less than 40 fpe. That's plenty for me. It shoots heavier H&N slugs pretty accurately too but I would have to increase the regulator significantly to get 55 fpe and it might not get there. I have noticed it is less planted at the bench at high 30s than it was at low 30s. Happens with higher powered light air rifles.
 
My 600mm Maverick with a 5" mod is 36.5" long and puts out 46.74 fpe at just under 110 bar on the 2nd reg . So a shorter mod would get you close to 34" and wouldn't have a problem with your power requirements either . Mine weighs 6lbs 11oz with a 300cc cf bottle. Its 31.5" long without a mod . It didn't come with a good tune from the factory but with your power requirements it would need to be tuned anyways. My only modification was a heavier hammer weight and is needed for getting 25.3 gr pellets up to speed .