I only have the Free/DNS tier for these domains. These domains do use Cloudflare as their Registrar though, so that may influence things.
However....
Aside from not being issued multiple-domain or multiple-customer certificates in a few years, I have not seen any such certificates issued to others "in the wild" for over a year.
Perhaps they still are, but:
- I haven't seen any questions pop up in this forum regarding this feature in years, and
- I have not seen a user who has posted issues with Cloudflare in recent years being issued any such certificate.
Before posting my comment above, I actually did search this forum for any mention of cloudflare and checked the crt.sh logs for a few dozen domains to confirm my suspicion they ended this practice -- I could not find any bundled certificates.
What I did see, is that Cloudflare underwent an infrastructure change over the past few years, and it seems to have finalized about a year ago.
The legacy system operated with a certificate showing a max of 49 "registered domain names", alongside a specific cloudflare subdomain. The specific domain appears to be a serial (you can iterate numbers above and below, and find valid A records), and is unique to the certificate bundle and/or bundle's lineage.
sni{numeric-id}.cloudflaressl.com{example}.com* 48*.{example}.com* 48
The new system allocates a dedicated cert for the registered domain, alongside a single cloudflare domain that is shared across all certificates.
sni.cloudflaressl.com{example}.com*.{example}.com
I do not know what Cloudflare is officially doing, but in addition to not seeing any bundled domains in quite some time, I also looked up many previously bundled domains (posted here and elsewhere) - and all had either migrated to the new system or left Cloudflare for LetsEncrypt.
Cloudflare could very well still be bundling certificates, but I have not seen them.
Then why did you bother posting the above? You haven't provided any information to support your personal opinion, and your comment admits you are unqualified to provide an answer.