We can install a free wildcard certificate for your (sub)domain with www and for all first-order subdomains on this domain.
For example, if you have multiple subdomains, like landing1.your-domain-here.com,
landing2.your-domain-here.com and so on, we can install a SSL for all subdomains (already existed and all created in the future) in *your-domain-here.com domain.
For this purpose, you should add a new CNAME record for your domain in the administration panel:
After adding this CNAME record, let us know via chat that you want to install wildcard Let's Encrypt.