schengen – Business visit to EU for equipment installation

I am an Australian resident in the UK, and a partner of a dual UK-EU national, operating a small business. I am exploring undertaking short business visits to install technical equipment on-site at a customer’s facility in Germany, over several days. This would occur in 2021 (post-brexit transition).

Do I need any application beyond the Schengen Visa-free access given to Australian nationals?