Link - Mtk 8227l Firmware
Q: How do I flash MTK 8227L firmware? A: You need to use SP Flash Tool, MTK USB driver, and a computer to flash the firmware.
If you’re not comfortable with manual flashing, many OEMs now provide an OTA (over‑the‑air) update utility. That’s the safest route for end‑users. mtk 8227l firmware link
You can find firmware links and files through these reputable community repositories and manufacturer pages: Q: How do I flash MTK 8227L firmware