Hi Mukesh,
Thanks for reaching out to the Google Ads API Forum.
You may note that you can upload conversions using enhanced conversions for leads data without having captured GCLIDs. However, you need to associate your offline click conversions with a conversion action by passing either the gclid, gbraid, or wbraid identifier. In addition, provide the conversion date time, conversion action resource name and optionally the conversion value and currency using ConversionUploadService. I hope this clears.
Let us know if you have any questions.
Regards,
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Google Ads API Team |