wkhtmltopdf build for alpine 3.19 not working correclty

Following instructions at https://gitlab.lakedrops.com/docker/wkhtmltopdf the resulting wkhtmltopdf does output black squares instead of text.

Dockerfile used (used libssl3 instead of libssl1.1 as latter not available, anymore):

FROM surnet/alpine-wkhtmltopdf:3.19.0-0.12.6-full as wkhtmltopdf
FROM php:8.2-fpm-alpine3.19 AS app

# wkhtmltopdf install dependencies
RUN apk add --no-cache \
        libstdc++ \
        libx11 \
        libxrender \
        libxext \
        libssl3 \
        ca-certificates \
        fontconfig \
        freetype \
        ttf-droid \
        ttf-freefont \
        ttf-liberation \
        # more fonts
        ;

# wkhtmltopdf copy bins from ext image
COPY --from=wkhtmltopdf /bin/wkhtmltopdf /bin/libwkhtmltox.so /bin/

For testing I have copied the 2 files into af-grp-php-1:

docker cp libwkhtmltox.so af-grp-php-1:/bin
docker cp wkhtmltopdf af-grp-php-1:/bin

Then in af-grp-php-1:/bin run:

wkhtmltopdf https://google.com /var/www/html/files/default/private/gam_pdf_test/test.pdf

which results in the following file:

test.pdf