How would the luftwaffe technology look like if the war was continued or delayed

If you don't know already, because of desperate times German scientists developed some crazy technology, especially in aircraft, like jet engines.

They had jet fighter prototypes and such in the works as early as 1944.
We've probably would've seen modern aircraft by the 60s.

Probably the use of jet fighters as more than primarily bomber interception/Defence of the Reich and fewer last ditch designs like the He 162. The Allies went from jets like the P-80 and mix propeller/jets like the Mikoyan-Gurevich I-250 to the MiG-15 and F-86 Sabre in like 2 years part and parcel because of captured German R&D. And then you get stuff like the F3H Demon in 1951 that is approaching F4 Phantom territory in terms of technology. I'm quite fond of the idea of the Ta 183 myself.

I'm a little interested in the prospects of the Amerika bomber project seeing as how without naval dominance and a large number of aircraft carriers, it'd probably still be the Luftwaffe's best shot at engaging the United States on its own turf absent of the development of intercontinental ballistic missiles (which was taking shape anyway in the form of the Aggregat 9 and would probably be operational by the late 1940s).

German infantry would probably be the first to use modern assault rifles. The StG 45 had entered limited production by 1945 and was a better rifle than the StG 44. The French redesigned it in 1949 into CEAM Model 1950 - the precursor to the H&K G3.

Well it depends on your POD (point of departure. Where the alternate timeline diverges from our own) if it’s early in the war for example, Germany prepares for a long war against the Soviet Union instead of a short one, it probably would look similar to how it was in our timeline. Things would just take longer to appear since they wouldn’t be rushed into production. If the POD was D-Day (German Victory) we might see the Army Air Core decide to field B-29s to compensate for lack of ground troops. If that happened you could expect the Ta-183 earlier or the BV-155 being put into production sooner as high altitude fighters. Jets would be restricted to ground support and fast bombers. Also since the American advance wouldn’t exist and the Soviets slowed down, the Hs-132 prototype would’ve been completed! Maybe even fielded... There is one last scenario though. What if towards the end Hitler’s wildest dreams come true and through sheer willpower the Soviets and Americans are pushed back! Every single bomber and escort is shot down by the expert veteran luftwaffe pilots of the Third Reich! The German pilots’ expertise and superior jet technology force the Allies to call their Daylight raids off and making night raids near impractical! The crippled German war machine roars back to life! Soon the X-4 is upgraded to the self guided X-5. We see projects like the enzian and HS 117 becoming successful putting the Germans years ahead of anyone else! But under what realistic circumstances would that ever happen? These maybe: https://youtu.be/epW5ktfYt9Q