There are many android tablets that you can choose from under $500, but it also depends on your personal preferences and needs.
One of the best tablets under $500 is the Samsung Tablet S7 11-inch, which has an OS: Android 10, a Screen Size: 11-inch, a Resolution: 2560×1600, a Processor: Qualcomm Snapdragon M865 (Octa-Core), a Storage: 128GB|256GB|512GB, a RAM: 6GB|8GB and a Battery Life: Up to 15 hours. It also has a 13MP rear camera and an 8MP front camera for video calls. It comes with an S Pen stylus and you can buy a keyboard case separately.
Another is, the Lenovo Tab P11 Pro, which has an OS: Android 10, a Screen Size: 11.5-inch, a Resolution: 2560 x 1600 pixels, a Processor: Snapdragon 730G, a Storage: 128GB, a RAM: 6GB and a Battery Life: Up to 15 hours. It also has an impressive quad-speaker setup with Dolby Atmos support and dual rear cameras (13MP +5MP) and dual front cameras (8MP + IR). It supports an optional keyboard cover and stylus as well.
A third is the Huawei MatePad Pro (WIFI), which has an OS: Android 10, EMUI10.0.1 (no Google Play Services), HMS Core, AppGallery), a Screen Size: 10.8-inch, a Resolution: QHD+ (2560 x1600 pixels), a Processor: Kirin990 Octa-core Processor + DaVinci NPU Architecture), Storage/RAM options of either 64 GB/6 GB RAM or 128 GB/6 GB RAM or 256 GB/8 GB RAM or 512 GB/8 GB RAM, and Battery Life of up to about 12 hours of video playback, or about 10 hours of web browsing, or about 9 hours of gaming, or about 7 hours of wireless projection. It also has an impressive quad-speaker setup with Harman Kardon tuning and dual rear cameras (13 MP + depth sensor) and dual front cameras (8 MP + IR). It supports Huawei’s M-Pencil stylus and Smart Magnetic Keyboard as well.
These are just some of the android tablets that you can consider under $500. You can check out more details and reviews online before you make your decision.
I hope this helps!