wkt

SELECT ST_GeomFromText(....);

from shapely import wkb
from shapely import wkt
a = {"BROWLOCATION": "KOMPSAT3A/Browse/33200/33281/K3A_20210405050036_33281_00003630_L0F_br.jpg", "CBIID": 'gg', "CENTERTIME": "20210405050037000", "CENTER_LAT": "33.09143135", "CENTER_LONG": "126.54021874", "CLOUDAVG": "A", "GEO_STASTEXT": "POLYGON ((126.4414596 33.13130046, 126.46785318 33.01416937, 126.64001411 33.05174934, 126.61385271 33.16888598, 126.4414596 33.13130046))", "IMAGING_MODE": "Strip", "LOWLEFT_LAT": "33.01416937", "LOWLEFT_LON": "126.46785318", "LOWRIGHT_LAT": "33.05174934", "LOWRIGHT_LON": "126.64001411", "OFFNADIRANGLE": "25.85008169", "ORBITSENSE": "ASCENDING", "PITCH_TILT_ANGLE": "-6.70749331", "PRODUCTID": "K3A_20210405050036_33281_00003630_L0F", "ROLL_TILT_ANGLE": "25.02271352", "ROW_NUM": 101, "SATE_ABBR": "K3A", "SATNAME": "KOMPSAT3A", "SENNAME": "AEISS-A", "THUMLOCATION": "KOMPSAT3A/Thumb/33200/33281/K3A_20210405050036_33281_00003630_L0F_th.jpg", "UPLEFT_LAT": "33.13130046", "UPLEFT_LON": "126.44145960", "UPRIGHT_LAT": "33.16888598", "UPRIGHT_LON": "126.61385271"}

c = a['GEO_STASTEXT']
print(c, type(c))

c = wkt.loads(c)
print(c, type(c))

d = wkb.dumps(c, hex=True, srid=4326)
print(d, type(d))

POLYGON ((126.4414596 33.13130046, 126.46785318 33.01416937, 126.64001411 33.05174934, 126.61385271 33.16888598, 126.4414596 33.13130046)) <class 'str'>

POLYGON ((126.4414596 33.13130046, 126.46785318 33.01416937, 126.64001411 33.05174934, 126.61385271 33.16888598, 126.4414596 33.13130046)) <class 'shapely.geometry.polygon.Polygon'>

0103000020E610000001000000050000005620C4DF409C5F402BD31674CE9040407FDB764EF19D5F40A1604A4DD08140406DDBBDFDF5A85F40DE71EDB89F864040B480E05C49A75F402C6D480E9E9540405620C4DF409C5F402BD31674CE904040 <class 'str'>