The following are some definitions of PC.
Personal Computer | Definition of Personal Computer by Merriam-Webster
personal computer - Wiktionary
personal computer
The definition of personal computer is not as clear as you might think. Many of the systems that people call PC are capable of (and used to) support many users, such as when used as an internet and/or database server. Smartphones, smart TVs and DVRs however would qualify as having a computer for just one person. And the definitions are out-of-date because the processors in most such devices would qualify as supercomputers a couple of decades ago.
To be more relevant to the current topic, Android phones support Microsoft Teams. Smart TV hardware can support cameras. Unless you know of a specific limitation of WebOS that prevents support of Microsoft Teams, it is just a matter of someone developing the application for WebOS. And now that Microsoft Teams is built into Windows 11 more people are going to want to use it.