Man pages matching name cam::pdf::renderer::textfb in section 3pm:

CAM::PDF::Renderer::TextFB.3pm.en	debian 10 / libcam-pdf-perl
CAM::PDF::Renderer::TextFB.3pm.en	debian 11 / libcam-pdf-perl
CAM::PDF::Renderer::TextFB.3pm.en	debian 12 / libcam-pdf-perl