YES - For NAR Members who have a Buyer Agreement with a client being shown a home, it is permissible to have another agent show the home on their behalf.

Reference Site: https://www.nar.realtor/the-facts/nar-settlement-faqs 

62. What does it mean to tour a home?

• Written buyer agreements are required before a buyer tours a home.

Touring a home means when the buyer and/or the MLS Participant, or other agent, at the direction of the MLS Participant working with the buyer, enter the house. This includes when the MLS Participant or other agent, at the direction of the MLS Participant, working with the buyer enters the home to provide a live, virtual tour to a buyer not physically present.