Does it make sense to do SEO optimization and security settings if the site is transferred to another hosting and another domain?

Question

Nginx

Good afternoon. I am developing a template for joomla. Already almost finished and at the end I decided to add several plugins for SEO optimization such as: Site map, robots.txt setting, indexing acceleration, page and text optimization.
Just install a few scripts for security. I develop the template on my hosting and will later be transferred to the hosting and the customer's domain. Does it make sense to do all this now, or is it best when you finally land on his page?

Answer 1

get rid of ~in the path to the certificate file, it is clearly written.

Answer 2

What's the difference? Of course it’s worth it ... the path in the robots and where else you need to change it ... and yet
you don’t buy links, this is all internal optimization so far

Answer 3

It has nothing to do with hosting.

Answer 4

and it's not enough to optimize the map and the robot.txt... Make the schema and OG better. This will have a significant effect on SEO.