the repository name changed (because more architectures supported now) , but #cURL 8.19 is up for #SailfishOS
Arm: https://repo.sailfishos.org/obs/home:/nielnielsen/sailfishos_latest_latest/armv7hl/
Aaarch64: https://repo.sailfishos.org/obs/home:/nielnielsen/sailfishos_latest_latest_aarch64/aarch64/
i486: https://repo.sailfishos.org/obs/home:/nielnielsen/sailfishos_latest_latest_i486/i486/