Offset calibrations of some WiFi access points that respond to FTM RTT (802.11mc) 
requests obtained using the WifiRttScanX app:

Offset is the difference between the estimated and the true distance.
(i.e. what needs to be subtracted from the RTT measurement).

With respect to Google Pixel 5 or earlier:

AP			freq (chan)	offset (m)	stdev

Google Wifi		5180 (36)	+0.70		0.37
Google Wifi		5745 (149)	+0.76		0.43

Google Nest Pro		5180 (36)	+0.46		0.32
Google Nest Pro		5745 (149)	+0.86		0.53

LinkSys Velop		2442 (3)	+5.33		0.81
LinkSys Velop		5180 (36)	+1.40		0.39
LinkSys Velop		5805 (161)	+1.33		0.52

Eero Pro		5180 (36)	+2.09		0.64
Eero Pro		5745 (149)	+8.17		0.33

Netgear Orbi LBR20	5240 (48)	-6.41		0.59
Netgear Orbi LBR20	5785 (157)	+7.96		0.38

Netgear Orbi RBR20	5240 (48)	-6.82		0.72
Netgear Orbi RBR20	5785 (157)	+8.01		0.36

Starlink Router		2437 (2)	+4.25		0.76
Starlink Router		5240 (48)	-0.21		0.85

COMPULAB WILD		5180 (36)	-2.91		0.85
COMPULAB WILD		5220 (44)	-4.40		0.64

ASUS RT-ACRH13		5765 (153)	-5.53		0.79

ASUS RT-ACRH17		5180 (36)	0.76		1.98

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With respect to Pixel 6 and later:

AP			freq (chan)	offset (m)	stdev

Google Nest Pro		5180 (36)	-0.6		0.25
Google Nest Pro		5745 (149)	-0.2		1.35


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st dev:	standard deviation of 100 measurements taken at the same distance,
with burst size of 8 (i.e. *not* the st dev reported by the API).

20 MHz channels 36, 40, 44, 48 all correspond to 80 MHz channel 42

20 MHz channels 149, 153, 157, 161 all correspond to 80 MHz channel 155

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The offset calibrations were done with true distances starting at 0.5 m, with
increments of 0.5 m, ending at 8 m or 10 m.  
At each distance, estimated values were read every 200 msec for 20 seconds total.