This Poor Galah 😣 

I did the same as you with my lorikeets, just put it near them & put treats in it & had them climbing in & out for months before using it for real. Mine are rescues & HATE being moved by others, I gave up on step up after 6 months of daily training, cause they would step up, but only if I agreed not to move my hand while they were on it, so there was no way for me that they were going to be ok in a moving carrier, no matter what, so I never even bothered closing the door until we were actually going to the vet. Mine is top opening & for the vet visit, I also put their favourite rope perch in it, along with treats & my girl's plastic eggs that she wasn't sitting on at the time, but wanted to keep in her cage anyway & I was surprised how good they were with the carrier! Barely stressed at all when the door was closed. At the vet, I opened the top & they climbed up onto it's edges, like they were used to doing at home, but made no attempt to go anywhere else, as they associated the carrier with being THEIR cage & with no alternative cage around, they wanted to stay in/on it, boy right inside it after vet had handled him. I'm guessing yours will be the same with where you're at now, even without in & out training if you just put some food or treats, water & a toy or 2 into it with them From my experience, I think just letting them play first, like you have, is absolutely the best way to do it - if time allows

She misjudged or slipped. I don't remember what exactly. She is kinda clutzy & in the cage sometimes she'll just drop too the bottom because it's more likely the easiest route. I've seen her hang upside down & chooses to drop to the bottom rather than climb back up. It's really a guess what exactly happened that actually injured her.

Oh she has many perches & areas of all sizes

I was watching her trying to eat the pvc training perch & thinking the same, that she's be much happier with a natural timber perch that she could chew when stressed, but the stress & chewing was probably a one off, due to the injury. The bird room at the end has lots of natural timber in it, plus ropes that galahs love. I'm guessing you did the same as me, thinking & writing that after seeing the first bit only, but her play area at the end looks awesome to me!

You could experiment with other treats and see if you can find one he really likes. But, lack of treat value is very often diet related. Is he on a seed diet?

Second on the seed diet. Try to convert him.

He is on a seed diet… I’ll try converting him

@@EllieDoesArt-xs9ni yeh, he's obviously not going to be interested in millet as a treat if millet is his normal diet that he gets in large amounts every day :) Switch diet & it will become a treat. Meanwhile, try grass that's in seed, see if he likes the seed on that, or the grass, he may. Switching diet is the easiest long term fix though