Please keep in mind, we are getting an MiG-23MLA, not a MiG-23MS. Alot of statements in this thread are thus not relatable to what we get.
The N003 radar of the MLA was rather capable for its time and not to be compared with the radar we know from the MiG-21bis (and MiG-23MS). Detection ranges are said to be 55km against a fighter sized target above and 25km below horizon. The radar can automatically switch modes to the most suitable for the own and scanned altitude and has a range of different PRF available.
Regarding the RWR, it was already stated that we will get both the SPO-10 and SPO-15, as latter was a frequent update to the MLA.