Under Tools and Settings click on Measurement – Conversions , choose + New conversion action , then import and choose Google Analytics 4 properties , then click continue and save , Conversions from GA4 are shown as primary conversions in Google Ads by default. The advantage of this last option is that you continue to see the same goal in Google Ads, but only the goal that you import from GA4 is included in the bid optimizations within your campaigns.
In addition, you can see in Google Ads what the differences are between the conversions from Universal Analytics and GA4. And these Telemarketing List differences will certainly be there, because of the different measurement methods. Keep in mind that no historical data is imported from GA4. So from the moment you put the conversions from GA4 into Google Ads, you will see the data appear and the conversions before that date.
Will not be included in the Google Ads reports. Export reports from Universal Analytics If you want to make sure that you want to keep certain data from Universal Analytics, you can always export reports to a CSV, Excel or PDF file or to Google Sheets. Then you know for sure that you can continue to see the data from past years. It is just not possible to import this data back into.