On company laptops this isn't always true, for instance here's the spec sheet of the ThinkPad T14 (this seems to be true for all ThinkPad models): https://www.lenovo.com/fr/fr/p/laptops/thinkpad/thinkpadt/th...

Where it states: Module dTPM 2.0 (Discrete Trusted Platform Module)

Same for HP EliteBook and ProBooks: https://h20195.www2.hp.com/v2/GetPDF.aspx/c08049273.pdf