Hitting Enter on a mobile keyboard creates a new cell in the table. As there is no Shift+Enter for mobile, it is not possible to create a new line in a table cell on mobile without using HTML. Perhaps can be a separate command for new line?
Type out
to insert line break manually
There is a related topic in the Help thread: from 2 years ago: Is there a better way to line break in table cells on mobile?
Thanks for making this! I support this request 
It does feel like an oversight. There’s a heap of available table actions in the mobile toolbar. Adding a “Table: Add new line” command seems like a no-brainer.
As a workaround, you can add a Templater template consisting of <br> to the command palette, create a macro for this command in Commander, and add it to the mobile toolbar. Then return to Commander to set a pretty Lucide icon for the command. (It’s a little unintuitive, I know.)
Just FYI: the post you linked to was made two months ago. “Oct 22” got you confused, haha.