forbesey1-verizon,
A partial answer from some 2022 tax preparation materials:
These Canadian and German social security benefits are treated as US Social Security:
• Canada Pension Plan: NR-4 codes 46, 47, and 48
• Quebec Pension Plan: NR-4 codes 49, 50, and 51
• Canada Old Age Security: NR-4(OAS) codes 44 and 45
• Germany Old Age, Disability, and Survivors Security
The taxpayer should have converted the foreign income into U.S. dollars. Add that to any U.S. Social Security
benefit and enter the total as a Social Security Benefit for the taxpayer or spouse.
If needed, use the yearly average currency exchange rates at the IRS web site:
https://www.irs.gov/individuals/internationaltaxpayers/yearly-average-currency-exchange-rates