Someone has had this detail on their switch after playing for two hours in DOCK mode heavy games like Doom or immortal fenyx.
https://ibb.co/7GjpRwL
the maximum temperatures that the console has reached in dock mode while playing for more than 1 hour:
Immortal phoenix
SoC: 61 ° C
PCB: 58 ° C
Zelda BOTW:
SoC: 55 ° C
PCB: 50 ° C
Fast RMC
SoC: 60 ° C
PCB: 56 ° C
It disappears after 20 min after the console recovers its natural temperature
https://ibb.co/7GjpRwL
the maximum temperatures that the console has reached in dock mode while playing for more than 1 hour:
Immortal phoenix
SoC: 61 ° C
PCB: 58 ° C
Zelda BOTW:
SoC: 55 ° C
PCB: 50 ° C
Fast RMC
SoC: 60 ° C
PCB: 56 ° C
It disappears after 20 min after the console recovers its natural temperature
