We have received a version of FileMaker Pro (19.6.1) which is compatible with macOS Ventura. Claris, Inc states:

Currently there are no known issues running macOS Ventura with the FileMaker 19.5 or the Claris platform.

System Requirements for FileMaker 19.6.1

macOS Ventura 13.0
macOS Monterey 12.0
macOS Big Sur 11.0
macOS Catalina 10.15

Windows 11 Enterprise and Pro Editions (22H2, 64-bit only)
Windows 10 Enterprise and Pro Editions (22H2, 64-bit only)