If you want to flash custom ROMs or custom firmware on Samsung Galaxy Tab A7 Lite, you will have to flash TWRP on it. We have it available for all Samsung Galaxy Tab A7 Lite and that includes SM-T220, SM-T225 and SM-T227.
Here are installation instructions.
Boot into Download mode on your A7 Lite by inserting an usb cable while holding both volume buttons –
Flash the latest .tar release from releases.
Hold the recovery combination (Volume Up + Power) while the .tar is flashing via the odin tool.
When booted up into TWRP go Flash and flash this zip, then go to Wipe > Format Data, all your data will be lost.
You can now boot into your system and do whatever you want. Feel free to download some nice custom firmware for your android tablet and enjoy newer software and functionalities that were not available on previous firmware.
You can also under clock Tab A7 Lite to enjoy better battery life or alternately, you can overclock Tab A7 Lite to get better performance.
Keep in mind you will loose warranty after flashing TWP on Samsung Galaxy Tab A7 Lite.