google ga4 analytics ads

I am looking for an experienced professional to help me optimise my ad spend through Google GA4 Analytics and Ads. I have specific KPIs in mind to track and monitor, and I am looking to hire someone to do a one-time setup for this project. My goal is to maximise efficiency in my ad spend.

Key project points:
- exisitng wordpress site (5 pages, built with Avada)
- client bookings are completed and paid via Acuity Scheduling (no other e-commerce). Must have experience dealing with third-party payment processors and Analytics (Acuity integration experience preferred)
- Existing Google Ads campaigns and GA4 accounts
- you MUST have experience with GA4 conversion tracking and integration into Google Ads
- must have experience with Google Tag Manager to create custom conversion events

The reason I am seeking assistance is that my current set-up is not functioning correctly after migration from UA to GA4 and relaunching a completely new web site in July.
GA4 is currently tracking *some* conversions, but those conversions are not flowing through to Google Ads. So you must have experience and skills to get all the parts of the puzzle working well together (GTM, GA4, Ads, Acuity).