Seems ST and your distributor differ in their interpretation of "obsolete".
The Datasheet of the ST72324 says "NOT FOR NEW DESIGN".
https://www.st.com/resource/en/datasheet/st72324k6.pdf
ST might continue to produce it for a while, but I would consider porting to the STM8 family (also 8 bit) or the STM32 family.
This forum is mostly populated by users, and very little ST staff. I suggest to get in contact with ST directly, via FAE or your distributor.
