Two (2) years is long enough, and assuming that your neighbour has not received a consent to his renovations from your Owners Corporation (O/C) and that the Model By-Laws contained within the NSW Strata Schemes Management Act (1996) [the Act] have been adopted by your O/C, you are absolutely correct about the breaches of that Act and of the By-Laws.
Whilst you can certainly raise the matter of the possibly unauthorised works and the breach of By-Laws at your Plan’s AGM, nothing can be “officially” resolved by the Meeting unless the matter is on the Agenda; and I’m guessing that it’s not.
That’s not to say that your Strata Manager and/or your Executive Committee (EC) should not heed your compliant by expeditiously discussing the matter with your neighbour and, depending upon his reaction, issuing him with a Notice to Comply (with the By-Laws) under S45 of the Act.
If your Strata Manager and/or EC don’t address the matter to your satisfaction or if your neighbour doesn’t comply with the Notice, then you may independently lodge an Application for Mediation of the matter with the NSW Office of Fair Trading, where if mediation is unsuccessful your complaint may progress to Adjudication where a decision will be taken, Orders made (e.g. to alter the times of or to cease renovations), and Penalties imposed for non-compliance – see https://www.fairtrading.nsw.gov.au/Tenants_and_home_owners/Strata_schemes/Resolving_issues_strata_schemes/Strata_and_community_mediation.html
Hopefully, your Strata Manager and/or EC will be able to resolve the matter because that’s their role, but if not, make sure that you have properly documented (at least) all the matters included in your Post before heading down the Mediation path.
Finally, you can always involve the Police by making a noise complaint, and whilst that’s a last resort in my opinion, I’m not suffering the noise disturbances.