the pair expanded their portfolio

[Maybo]

"At the beginning, it was just to feed the restaurants in Paris," said Martin. But in 2021, the pair expanded their portfolio to include Les Terrasses de l'Ile, a nearby guinguette (country restaurant), complete with a tiny house perfect for hosting visitors.
(The exodus of Paris' chefs to the countryside by Emily Monaco)

Does "portfolio" mean "a collection of company shares and other investments that are owned by a particular person or organization (dictionary)"?

 

[dunchee]

No.

portfolio | meaning of portfolio in Longman Dictionary of Contemporary English | LDOCE

portfolio meaning, definition, what is portfolio: a large flat case used especially for ca...: Learn more.

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From Longman Business Dictionary
→ 2[countable] all the products or services offered by a particular business