Extremely limited. There are exactly two known projects, both abandoned since ~2018–2019:
Tech Revivalist Target Device: Samsung Galaxy Tab A6 (2016) – Model Number: SM-T280 Skill Level: Intermediate (ADB, Odin, TWRP)
You cannot flash a custom ROM without a custom recovery. Here is the condensed workflow. samsung galaxy tab a6 sm-t280 custom rom
"I saw a YouTube video claiming Android 10 for SM-T280." Fact: Those are either clickbait, a different model (SM-T285 has LTE, still no custom ROM), or a malware-infected "ROM" from shady sites (ROMHut, CustomROMs.net).
Boot, touchscreen, basic Wi-Fi (unstable), SD card. What doesn't work: Bluetooth, camera (both front and back), GPS, deep sleep (battery drains fast), YouTube beyond 360p (no hardware video decoding). Extremely limited
The following are the most common community-developed upgrades:
Spreadtrum violated the GPL (General Public License) for years by not releasing full kernel sources. Samsung also treated this tablet as a low-end, disposable device. As a result, almost no independent developers (like those on XDA-Developers) bothered to build custom ROMs for it. "I saw a YouTube video claiming Android 10 for SM-T280
Ensure your Windows PC recognizes the tablet. Download and install the latest Samsung USB Drivers. This prevents connection errors during the flashing