With this method, you don’t need a third-party app. Call the person you want to chat with, then tap the “Add Call” button on your phone’s screen. Dial your own phone number—the one you’re calling from. This will take you to your voicemail. Once your voicemail has started recording, tap the “Merge Calls” button on your screen. Now, you’ll record your phone conversation onto a voicemail message. When you’re done with the call, you can tap the share button to export it to your Mac via Airdrop, to the Voice Memos app, or transfer it via email or text message. The file is recorded as an M4A, so depending on what you want to do with it, you may need to convert it to MP3 before uploading it to other apps.
HI, you’ve reached (name). I’m so sorry I can’t pick up the call right now because I am standing right behind you. GOTCHA.

Set up call forwarding To start forwarding your calls, click your profile picture at the top of Teams, then select Settings > Calls. Under Call answering rules, choose Forward my calls, and then select where you want your forwarded calls to go: voicemail, another person, or a call group.
Step 2. Tap “Voicemail”, and then tap “Greeting” in the upper left corner of the screen. If you’re using an eSIM with a second line, select a line first such as Primary, Secondary, 888-888-8888, etc.