It is expected that the results will not match (exactly) with your reports in the Google Analytics 4 user interface. Don't worry about it, it can occur for a variety of reasons.
A query to generate the Google Analytics 4 traffic acquisition report in BigQuery. In this report you'll find data about acquisition at session level: users, (engaged) sessions, engagement time and rate, segmented by default channel grouping, medium, source and campaign.
A query to generate the Google Analytics 4 user acquisition report in BigQuery. In this report you'll find data about your new users, engaged sessions, engagement time and rate, segmented by medium, source and campaign.