I can speak English a little.
In the end, I used plugin.
Most of the issues have been resolved, but only the favicon in the dashboard has not changed.
Deleting a photo does not change it.
Will it be fixed over time?
The last time I tried to switch to AMP, the icon was displayed in a funny place, so I stopped it.
I feel that there is something wrong with the icon settings.
I am glad if you can confirm.