The HA Green is spec’d at needing a 12V 1A PSU (12W), yet the USB ports can supply 5V @2A (shared) so 10W. Does that really mean the HA Green only pulls 2W and has enough headroom for de-rating in a warm location?
All Raspberry Pis and variants (I would say HA Blue, Green and Yellow is such one) have issues with power when drawing too much from the USB ports.
Even 2 small radios can cause issues and the suggestion is always to get a powered USB2 hub and connect the radios to that.
USB2 is chosen because USB3 often cause interference with radios and the radios very rarely need USB3 speed anyway.
The USB3 ports on the Raspberry Pis can be used for a SSD upgrade as the only thing that draws power directly from the device.