I read somewhere the Sens are hoping to have a development camp in early September. I guess when international travelers are allowed back into Canada? Might be a lot of political and bureaucratical red tape still to get through.
In any case if they do manage to hold one I doubt it will be open to the public.
edit: found the Sens info
https://twitter.com/user/status/1421264381300678663
with an update a few days later
https://twitter.com/user/status/1422367780968484874