Danish glyphs ǿ and Ǿ

Something is rotten in the state of Danish characters!

The Danish glyphs ǿ and Ǿ are
- **correct** in Libre Office's **Libre Writer,**
- **weird** in **LaTeX**, and
- **missing** in MS **Word**.

"Weirdness" in LaTeX: The unicode glyphs ǿ and Ǿ appear correctly in LaTeX if I use Source Serif elsewhere in the document with the explicit LaTeX constructions `\'\o` and `\'\O`; otherwise, the unicode characters appear as "tofu".

MS Word converts them to Cambria and does not allow me to convert them to Source Serif.

(Given the errors with Word, I do not give details of my LaTeX set-up.)

These two glyphs are very rarely used in Danish, according to Wikipedia.