You don't have to use Camera Raw only when opening a file. In Photoshop CC 2019, go to (or press Ctrl+Shift+A ) to use the ACR interface on any standard JPEG or pixel layer.
Acquiring the Camera Raw filter for Photoshop CC 2019 should be done via Adobe’s official channels and with attention to version compatibility and camera support. Avoid unofficial downloads to reduce security, stability, and legal risks; instead, match ACR and Photoshop build numbers and use Creative Cloud or Adobe’s update pages for safe installation. camera raw filter download for photoshop cc 2019