RE: is it possible to get tested for antibodies?
Of course. A COVID-19 antibody test, also known as a serology test, is a blood test that can detect if a person has antibodies to SARS-CoV-2.
Consult your doctor. You have to be willing to pay for it though.
The serology tests for antibodies for SARS-CoV-2 may not help with the latest push to treat the variants as distinct threats. I don’t know if the current serology tests are variant specific.