4 points
Think I can answer my own question.
Through this site of Mozilla:
https://last-chance-for-eidas.org/
I stumbled upon this open letter:
https://eidas-open-letter.org/
At the bottom of the letter there’s a link to this form,
which I’ve signed (1. Honorific “Developer”, 2. Institution “Independant”) to join the opposition:
https://pads.c3w.at/form/#/2/form/view/mc8X+BfJrv5J-y5Z3LfONA4mpLmD7owmnWizzoikNTw/