Can i update from Catalina directly to ventura?

Yes.

Also see: Upgrade to macOS Ventura - Official Apple Support

Jump that far into the future, Catalina released in Oct 2019 to Ventura released Oct 2022 might work but the caveat is that there have been many changes since that time ( 2019 ) to ( 2022 )

I personally would suggest going that it in steps. Catalina to Bug Sur and pause there. Move up to Monterey when all is sorted out. Then move up to Ventura.

Notation and specific to Monterey and above. If the computer has a Non Apple Original Internal Drive - there maybe some disappoints moving to Monterey.

Monterey contains an EFI Boot ROM included in the Installer. If it does find Non Apple Original Drive - Monterey will balk and make not install at all.

The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.

With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install.  For Best results use Safari to commence the download as Others may not work.

Safari will open a redirect and open the Apple Store where the download can commence.

Computer Qualifying for macOS 13 Ventura 

Computer Qualify for the Monterey upgrade

macOS Big Sur 11 hardware requirements

Make Time Machine Backup  is very useful 

I'd say it's not advisable to make that big a jump in one step. Changes to macOS since Catalina have been significant enough that it would be better to either:

1. wipe the drive and install Ventura from scratch or
2. upgrade to either Big Sur or Monterey first, then upgrade to Ventura.