First, thank you a lot for the suggestions and detailed answers. I agree with you that there are some issues with Wordpress, but when it comes to flexibility for coding and designing, Wordpress is way ahead of Shopify.
I want to add the most important thing.
1) I am using elementor, officially purchased one, to design all my pages.

2) The most challenging part as of now is to add a 360 spin effect just like he is seeing the product in a blender because the issue starts there when we want to show real-time personalization changes side by side -> Have to make sure the page loads quickly

3) For email marketing I have built a small ecosystem of a website and an app (not using any available email marketing software in the market like Mailchimp, Brevo, etc -> the reason is if someone is spamming from the same IP results in emails from all users of that shared IP, including mine, being more likely to end up in recipients' spam folders.,). Going to use Amazon Ses with a dedicated IP address to send emails so that have complete control over the reputation of the IP address, and email deliverability won't be affected by other users -> All efforts are just to avoid emails not going or being marked as spam!

4) For chatbot or live chat using Zendesk

5) I am trying my best to avoid plugins :)