We have installed the XWiki Debian 17.1.0.
It seems the inline editing in WYSIWYG mode is unavailable in macros.
For example, I add a Container macro into a page with some text, but I cannot edit the text inline. It is possible only in Source or in Macro editing mode.
Guys, thanks for the prompt replies!
It is a little inconvenient, as we have a number of such pages migrated from Confluence. But it seems we have to deal with that.