The Artemis II crew – Mission Specialist Christina Koch (top left), Mission Specialist Jeremy Hansen (bottom left), Commander Reid Wiseman (bottom right), and Pilot Victor Glover (top right) – uses eclipse viewers, identical to what NASA produced for the 2023 annular eclipse and 2024 total solar eclipse, to protect their eyes at key moments during the solar eclipse they experienced during their lunar flyby. This was the first use of eclipse glasses at the Moon to safely view a solar eclipse.
Source: NASA

Artemis II Pilot Victor Glover, on the left, and Mission Specialist Christina Koch, on the right, gather images and observations of the lunar surface to share with the world during the lunar flyby on the sixth day of the mission. The crew spent approximately seven hours taking turns at the windows of the Orion spacecraft as they flew around the far side of the Moon. At closest approach, they came within 4,067 miles of the Moon’s surface.
Source: NASA

Astronaut Jeremy Hansen captures an image through the camera shroud covering window 2 of the Orion spacecraft. The camera shroud, essentially a curtain with a hole for the lens to pass through, is used to prevent light from the cabin from reflecting on the windowpanes.
Source: NASA

Midway through their lunar observation period, the Artemis II crew members, seen here (From left to right: Victor Glover, Jeremy Hansen, Reid Wiseman, and Christina Koch), pause to turn the camera around for a selfie inside the Orion spacecraft.
Source: NASA