For Samsung Galaxy Tab 3 Sm-t211 - Custom Rom

Disclaimer: Flashing custom software voids your warranty (which has likely expired anyway) and carries a small risk of bricking your device. The author is not responsible for data loss. Proceed at your own risk.

Since official LineageOS support ended years ago, your best options are "Unofficial" builds or ports found on developer forums (like XDA Developers). Here are the most stable options available: custom rom for samsung galaxy tab 3 sm-t211

This is the biggest bottleneck. The SM-T211 has 1GB of RAM . custom rom for samsung galaxy tab 3 sm-t211