Yes, it's NetSpeedMonitor by FlorianGilles (website is down, but it was https://floriangilles.com/software/netspeedmonitor. You can download it from Cnet). It's a toolbar app, one of the only reasons I installed StartAllBack. The other reason being BatteryBar, I like seeing my battery percentage/time left at a glance. If you don't use StartAllBack, I found TrafficMonitor by zhongyang219 on GitHub works flawlessly on vanilla Windows 11. It has an option to dock in the taskbar, almost identical to NetSpeedMonitor. But I use NetSpeedMonitor because it doesn't require a running program on system tray since it's a toolbar app just like BatteryBar.