Sharepoint list field size not refectex in edit form

Hi Team, @ I hope everybody is doing as well, safe, and healthy as possible.

I'm using different lists on different modern sites with Multiline of text fields.

I set the Numbers of lines for editing in 20.

But when I'm editing this form that view doesn't reflect this value and I can't use the bottom corner option to expand this field.

Any suggestions are really appreciated.