7.3 for 7 minutes 21 isn't that high and it's far less impressive than the Peyresourde. I'm pretty sure Contador did 7.3 in one of his last seasons, I think it was Alto de Malhao 2016 or something.
6.7 for 8 minutes is just not very high.
Perhaps Bernal's head is still calibrated at Vuelta Colombia where 6.7W/kg is high at 3200m altitude.
Contador did 7.14 W/kg on Malhao in 2016. But this is different. Pas de Peyrol is 1000 meter higher. Furthermore they already had a 11 minute effort of 6.6 W/kg at Neronne.
If you take out Willunga Hill, I have only a counted a few performances higher today for +7 minute efforts:
Chaves: Ermita Santa Lucia 2017 7.42 W/kg
Perez: Navacerrada 2004 7.4 W/kg
Pantani: Croix Neuve 1995 7.34 W/kg
(light riders have slightly higher W/kg when climbing the same speed as heavier climbers)
6.87 W/kg for Bernal is ok. He produced already 7.04 W/kg at Croix Neuve in 2018 and 6.95 W/kg at Superga 2019. But both performances are under more favourable conditions.