Yes. Tourists can be admitted to large-scale events if they can show a COVID certificate.

The following applies to people who have been vaccinated:

You can either show a recognized non-Swiss certificate or you can have a Swiss COVID certificate issued.

You can obtain a COVID certificate in Switzerland if you have been fully vaccinated with a vaccine that is authorized in Switzerland. In each canton there is at least one body or office responsible for this. You will find more information on the cantons’ websites.

In all other cases you must have a test to obtain a COVID certificate.

The following applies to people who have not been vaccinated:

You must have a test, and if the result is negative you can then be issued with a COVID certificate.

Source: https://www.bag.admin.ch/bag/en/home/krankheiten/ausbrueche-epidemien-pandemien/aktuelle-ausbrueche-epidemien/novel-cov/haeufig-gestellte-fragen.html?faq-url=/covid/en/covid-certificate/are-tourists-also-admitted-large-scale-events-where-covid-certificate-required