I already tried XL6007, as well as some other XLSEMI products.
They all have a specific issue - if power source (battery, etc) has high internal resistance, so at startup, when output mosfet opens, source voltage drops for a moment, mosfet will stay open, cause short to the ground, voltage drop, so UVLO circuit will stop it's driver, but mosfet remains open, so depending on your power source energy, you will get either burnt chip or burnt battery or other, undersirable audiovisual effects
regarding the LCSC, the above shown IC was found on their website, but as you can see, all such designs have very limited input-output ranges. Adding LDO is not a good idea at all - if I can add LDO and tolerate huge losses on it, than I'll use something like 7812 directly