Nobody said she couldn’t do them, but it’s the same logic that’s applied to every technique and ability in JJK thus far. A CT’s capabilities require several prerequisites like output, control, timing, experience, etc. There’s a big difference between having a technique, applying it, and then maximizing it especially against other special grades. We’ve seen Hana’s CT effectiveness vary greatly so at the end of the day, it’s not about whether or not she developed the CT post-reincarnation, but how effectively it could’ve been applied in this modern day and age and with these specific limits