The 802.11ax describes the following operation for PHYreset for a detected OBSS packet or not update the Station’s Basic NAV timer based on the below rules maintaining a non-SRG OBSS PD Level:

There are further “NOTES” provided which describes non-SRG operation in 802.11ax in the same section (section 26.10.2.2 of the 802.11ax standard). The interested reader can refer the same

OBSS PD SRG Packet Procedures in 802.11ax