This is usually a storage or connection issue. Clear out some old apps to make room for the update file and toggle your Wi-Fi off and then back on. "Device is Stuck on Boot Screen"

Finding a genuine firmware update for a Tab910 is difficult because "Tab910" is a generic model name used by multiple small manufacturers. MediaTek Cheap China "Fake" Tablet 2021 Review

is a capable budget device, it requires a bit of DIY spirit. Always back up your photos and files before attempting any software changes. Keeping your tablet updated ensures you get the most out of your hardware for years to come! Check & update your Android version - Google Help