Lankinen had been held out since Friday. His absence doesn't necessarily mean he tested positive for COVID-19.
General manager Stan Bowman said last week that the team was 100% vaccinated.
The 26-year-old Lankinen is coming off a solid rookie season, going 17-14-5 with 3.01 goals-against average and a .909 save percentage. He is expected to back up Marc-Andre Fleury this year.