does Acronis intend to lauch add-on to sql-server for linux ?
Aconis Backup Cloud
Yes, we do have such plans with no exact timeline.
Such matters are best discussed in the ticketing systems, where you can safely provide information such as "how many devices with Linux SQL" you have and how much data there is to back up potetially.
As for the data, the new format of the archive in all modern agents (9940+) is totally capable of backing up any kind of data, including SQL for Linux.