Does Letsencrypt support Wildcard SAN?
e.g.
./certbot-auto certonly --manual
-d *.abellera.com
-d *.dev.abellera.com
-d *.stg.abellera.com
-m test@test.com
–preferred-challenges dns-01
–server https://acme-v02.api.letsencrypt.org/directory
Yes! 
Let’s Encrypt certificates can include 1 to 100 names. They can be any combination of wildcards and non-wildcards.
If you also want to use https://abellera.com/, you need to add “-d abellera.com”.
Just in case you didn’t know it, that certificate will not be valid for abellira.com because *.abellera.com only covers subdomains of abellera.com and not abellera.com itself (for that you must explicitely add “-d abellera.com”)
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