The airs screen was good but not great. Not compared to the 13” pro.
As for peripheral, not at all. My iPad lives mostly in its keyboard folio. I also regularly use a USB-C dock with it for either Ethernet access, HDMI output to hotel TVs, or memory card reading (camera). I know a few people who carry around 8bitdo Bluetooth game controllers for use with all sorts of devices (steam deck, laptop, phone, iPad). If you’re a diehard gamer, it’s well worth it.