For the 5 GHz DFS subbands 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 an 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 a similar coverage area for both bands.
FCC 5 GHz UNII-2A vs. 6 GHz Low Power Indoor Max TX Power Limit
