Tuya-Convert might not be possible for this device since the template was added (2019-12-17). All new Tuya devices have firmware preventing flash but it is still possible to Tuya-Convert old stock devices without connecting them to the Tuya app.
This template is only for SHP6 10A version. New 15A template is here.
If you prefer the red LED to represent “Power ON”, swap Led1i and LedLinki in the Configure Template page.
Serial Flash Instructions
Complete guide on Tasmota Docs