The International Space Station (ISS) regularly hosts spacecraft from various space agencies, docking for crew rotations and resupply missions. These spacecraft include those from NASA (such as the Crew Dragon from SpaceX), Roscosmos (Soyuz), European Space Agency (ESA), Japan Aerospace Exploration Agency (JAXA), and others with agreements to visit the ISS.
If you believe you saw a docking event, it could have been any of these missions. They are often covered by space agencies with live videos and social media updates, given their significance, not just for logistics but in fostering international collaboration in space exploration.
Moreover, advancements in commercial spaceflight have increased the frequency of such operations. Hence, it’s quite possible you observed one of these regular docking procedures. Timing and visibility from your location at the time would align with publicized schedules and live streams. For definite confirmation, you can check respective agencies’ websites or attend their live broadcast announcements for recent docking operations.