For 5GHz DFS sub bands U-NII-2A and U-NII-2C, the AP power limit is 24 dBm (250 mW) for all channel widths. For a 6 GHz Low Power Indoor AP this is equivalent to 80 MHz channel width as illustrated in the following diagram. This is one reason why in the 6 GHz band it is recommended to deploy wider channels to maintain similar coverage area for both bands.
FCC 5GHz UNII-2A vs. 6GHz Low Power Indoor Max TX Power Limit
