This paper shows that the outcome for hypothyroid patients who contract covid-19 is not different for those who are not:
Front. Endocrinol., 18 August 2020 | doi.org/10.3389/fendo.2020....
Outcomes of Patients With Hypothyroidism and COVID-19: A Retrospective Cohort Study
Maaike van Gerwen , Mathilda Alsen, Christine Little, Joshua Barlow, Leonard Naymagon, Douglas Tremblay, Catherine F. Sinclair and Eric Genden
Paper is open source