If your company adds it’s own SSL/TLS certificate on every PC, then yes… they can see almost everything.

• Browser traffic? Yes.
• Chat messages? Depends on the program. If it uses the Host OS certificates, then yes.
• Listening in on IP audio and video calls? Theoretically yes.
• AI supported employee sorting based on Union friendliness? You bet.

The buzzword for this is “Next generation firewall” and “TLS decryption”.

Your company does not give shit about customer data or your privacy or rights.