Currently, the highest resolution satellite data is ASNARO-1 monochrome image with 0.5-meter resolution (as of December 2021).
Please check the data catalogue for details of each data.


ASNARO-1
https://www.tellusxdp.com/traveler/viewer/

In addition, MAXAR satellite images with a resolution of 30 cm are also available for commercial use.
Please check from Tellus Traveler.