The attribution waterfall of Kochava is as follows;

Clicks take priority over impressions
Impressions on the phone (when device ID is present) take priority over impressions on the CTV

Therefore attributions to CTV impressions could be very limited.

We have some options to try and give some priority to CTV impressions

To modify the way the waterfall works two options exist within Kochava;

Attribution behavior set to inclusive: Change the configuration of the device attribution behavior (on impressions) which means that the system will attempt fingerprinting in all impressions.
Activate Fingerprinting Equalizer: This is a solution needs to be manually implemented on their side on a campaign basis.
The Fingerprinting Equalizer, makes probabilistic matching on par with deterministic matching, essentially enabling Kochava to run true last-touch attribution rather than using the waterfall. Note that this is not specific to CTV in any way, it applies to any/all probabilistic attribution. Additionally, it does not change the fact that clicks will match before impressions

Kochava - CTV to Mobile Tracking