Yes! One option for walkers is to use the Walk & Talk step counting conference call feature to have a call with up to eight others and keep track of the steps you're doing together.
It's also possible to have a regular phone call, or an internet conference call (for instance using Skype, Zoom or WhatsApp), during a live activity. Set up the call first, then go to Racefully to start and join the live activity. The Racefully audio updates will reduce the volume of your call when they are playing, then increase it again afterwards.
Note that live activities plus voice calling can drain your phone batteries more quickly than either individually.