No lol. Characters are only invincible on wakeup until they have control of their character. This has been the same in NRS games forever. D1 wakeup has always been invincible to highs. I used to abuse wakeup d2 in MKX to stop people from thinking they can pressure me with highs on oki.
Only u3s and rolls are actually invincible in MK11.
Also wrong. You could meaty people on the ground in other NRS games bc there were little to no Iframes in the proccess of getting up until MK11. High meatys were also real, but in this game you can wakeup in crouching state out of the Iframes.
You misinterpreted what I said about the semi-invincible wake up buttons. I should have worded it better but what I tried to say is that, for example, as Liu Kang, you have a 7 frame Jab and 21 Iframes to get up, which means a wakeup jab will come out in 28 frames and it basically consists in semi invincible kind of wakeup, since if you go for your meaty and it connects on frame 20, the Iframes will eat it out and you'll get full comboed by the Liu player. "But then you mistimed your meaty" well, yeah, but one thing is mistiming bc your opponent is still on the ground and being punished, having your meaty eaten by Iframes into a normal is another animal, and let's not forget you can do the same thing on 3 different windows with regular wakeup, short delay and long delay, + all the other wakeup options.