Assuming that your company email is hosted on a modern server, I would suggest to use webmail on both the PC and MacBook Air for a modern and consistent experience. Webmail (such as the web version of Outlook for Microsoft 365) avoids needing to configure any email client software and ensures that you are seeing the same information from anywhere on any computing platform. Webmail also ensures that Calendars and Contact features work as designed by the hosting provider.
There is one very important issue that you need to consider. Check the POP3 account configuration in the Outlook account configuration on the PC. See if the setting is enabled to "leave email on server", or not. If not, then your email may only be stored in a local Outlook .PST file on the Windows PC. If that is the case, then you should ask for IT assistance at your company to help you establish either an IMAP or Exchange connection to the server and copy all of the email from the PST file to the server. If the "leave email on server" setting has been enabled all along, then you are in much better shape and may not need to do anything but to start using IMAP or Exchange instead of POP3. You should absolutely abandon ever using POP3 to access your email again.
Your goal should be to have all of your email stored on a modern email hosting service. Once you accomplish that, then seeing the same emails from any computing platform is very simple by using either webmail, IMAP, or Exchange, depending on the server type.
