There are two types:
- Applications – https://www.dol.gov/agencies/eta/foreign-labor/performance
- Approvals – https://www.uscis.gov/tools/reports-and-studies
Applications seem to run around 500,000 to about 650,000 per year, and you can find a summary for each year like this one:
https://www.dol.gov/sites/dolgov/files/ETA/oflc/pdfs/LCA_Selected_Statistics_FY2020.pdf
Approvals can be found in reports like this one:
https://www.dhs.gov/immigration-statistics/yearbook/2019/table25