When will the rest of the Grenada, West Indies birth, death and marriage church and civil record be digitised for online viewing to enable complete ancestry research.
FamilySearch never gives estimated dates (not even "Coming soon..." previews) of when new material is to be added online. However, if the records you are seeking are of fairly recent events, it might be privacy laws that are holding back any further releases.
Alternatively, maybe the record custodian has not given FamilySearch permission for commercial reasons - e.g. how given / sold the publication rights to another (subscription) website, or is only making the records available through its own one.
Are you asking about records that were previously available to order on microfilm, or about records that FamilySearch has not (yet) acquired in any form?
All of FS's microfilms have now been digitized, but as Paul said, there are other considerations involved in making material available online, most notably consent of the record custodian, and relevant privacy laws. This is why some records are still only available on film, which restricts their viewing to the Family History Library in Utah. (The Library does offer a lookup service.)
The same considerations of owner consent and privacy laws apply also to current record acquisitions. FS is constantly working on acquiring historical records, with the best possible access for all of its users in mind, but these efforts are hampered by the desire of many record custodians to monetize their holdings. Archives want to figure out how to digitize their materials themselves, and then charge money for access to those scans. I don't know whether this mindset applies to the records you're looking for, but it is something to keep in mind.