I would like to add extra TABs for my text inside a table-cell in Impress.
Ctrl+TAB Press works fine in Writer by adding extra tabs inside a table-cell. But not in Impress.
Create your table in Writer, copy it, then in Impress click Edit > Paste special > Paste special > LibreOffice Text Document
Yes, it works like an alternative, but it would be better to improve Impress by adding tab features inside table cells.
tdf#141905 ( Use ctrl+tab to create a literal tab character in Impress tables)