As described in this thread :
https://community.adobe.com/t5/indesign/can-t-rename-layers-indesign-2021-16-0-also-happened-in-2020/td-p/11550199/page/2?page=1

It's impossible to rename layers when the panel is docked
I also have problems in naming things in some particular panels like the Paragraph styles details box when i want to create a nested style and type the exact word i want the style to stop
(see screen capture) i manage to click it but it's like magic clic and clic and clic... sometimes work sometimes not... i'm getting crazy with it and loos a lot of time.

Thank you for updating