Welcome to the tubeless tight fit world. We often have to overinflate the tires to seat them by a lot. We also use tire seating pliers to pull the beads up and into the rim's seat frequently. (Just did one at the end of the day today). Just tried a search for "Shining Etrto 622x19 A-M3" and didn't get any references or info. Is this the brand or some other description? The reason I ask is that rims tend to have a wider tolerance of bead circumference then tires do. Rims are generally rolled out, cut, and seamed in batches of about ten. many hundreds of tires come out of the same mold. So the variation between rims is usually greater then that of tires.
Having said that tubeless rims and tires are generally being held to tighter tolerances then matching non tubeless siblings. Some manufactures tend to keep to one end of the tolerance range, or the other end. In the end if the shoe (i mean tire) doesn't fit you need to get one that does. Andy