If you go to this page - https://downloads.livecode.com/livecode/
You will see all downloads available. Let's look at the last two versions that were rolled out.
v9.6.1 had 2 release candidates, and then was judged 'stable'.LiveCode 9.6.1
Community Edition Community Plus Edition Indy Edition Business Edition Community Server Release Notes Release Date
STABLE Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 19 August 2020
RC 2 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 4 August 2020
RC 1 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 29 July 2020
LiveCode 9.6.0
Community Edition Community Plus Edition Indy Edition Business Edition Community Server Release Notes Release Date
STABLE Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 1 June 2020
RC 2 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 20 May 2020
RC 1 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 11 May 2020
DP 4 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 16 April 2020
DP 3 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 19 March 2020
DP 2 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 18 December 2019
DP 1 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Win 32 | Win 64 | Mac | Linux 32 | Linux 64 Release Notes 26 November 2019
v9.6.0 had 4 developer previews, 2 release candidates, and then was judged 'stable'.
The general process (as I understand it) is that they release DPs and people test that. *IF* the DP comes back as more or less stable, they then release a RC, which is considered more or less stable but may not be fixed in configuration, or may not be feature complete.
Once they figure it is stable enough, and the features are more or less in the way they want it, and they have fixed the majority of bugs (theoretically), they mark it as 'STABLE'.
There is no way I know of, short of being part of the development team, to know when they reach these marks, and so there is no way to know when something *will* be released as "STABLE".
If you scroll down that page, you will see that a few have been made stable after only a single rc or dp. Some never made it to stable at all.