Digital Signature not available in Fill & Sign

Hello,

i want to have the possibility to e-Sign documents via cloud signature on my mobile device.

I saw online that I need to enable the digital signature option in the e-signing settings and "digital signatur" should sho up in Fill & Sign beside the handwritten signature and the initials.

I activatet everything but I still don´t have the button.

Does anyone know, what I did wrong?

Thanks