You can always install the community one:
# pkg add -f https://pkg.opnsense.org/FreeBSD:14:amd64/25.7/MINT/25.7.10/latest/All/acme.sh-3.1.2.pkg
# pkg add -f https://pkg.opnsense.org/FreeBSD:14:amd64/25.7/MINT/25.7.10/latest/All/os-acme-client-4.11.pkg
Cheers,
Franco
# pkg add -f https://pkg.opnsense.org/FreeBSD:14:amd64/25.7/MINT/25.7.10/latest/All/acme.sh-3.1.2.pkg
# pkg add -f https://pkg.opnsense.org/FreeBSD:14:amd64/25.7/MINT/25.7.10/latest/All/os-acme-client-4.11.pkg
Cheers,
Franco
"