Campaign ID filed can be found in https://matomo.org/docs/tracking-campaigns-url-builder/ but it is not available when accessing from Matomo and this can be viewed from our demo and same can be reproduced in Cloud and On-Premise.
@KarthikRaja1388 That's a duplicate of https://github.com/matomo-org/plugin-MarketingCampaignsReporting/issues/40
And there is already https://github.com/matomo-org/plugin-MarketingCampaignsReporting/pull/41 to fix that
@sgiehl I think this issue is purely about the campaign builder? I'll reopen it for now as it's not present there.