I completed my RPL last year. Within the RPL form you'll see the following "Of the two reports, one must apply to a project undertaken within the last three years, and the other for a project within the last five years."
You'll be unable to claim points for any of the work experience used for the RPL.
I was in a similar situation, having worked in ICT for 13 years, I could only claim 5 years of relevant work experience, simply because I only completed by degree in 2017 and I had to use 8 years of work experience for the RPL.
When you receive your ACS skills assessment back it'll tell you when you met the skills date. Any work experience after this date can be used to claim points.