Bluetooth speakerphones are an underrated accessory.
Wirecutter has a good roundup of options, which are as good for Zoom calls as advertised, but they’re also just useful in life! I use mine roughly as a desk phone, and also connect it every time we’re doing the “everyone gather around the phone to talk to Grandma” thing. I have the Jabra Speak 510, and love it.
Source: The Verge