Here are some of the things that need some attention:
1) None of your pages have an H1 title, which is weird considering the website is on WordPress and WP won't let you publish neither pages nor blog posts with empty H1 field. Whoever built the website with Elementor must have forgotten about H1's.
2) You have a bunch of sample pages there likely were a part of your theme. You need to take those down -
https://onlineworkaura.com/wp-sitemap-posts-project-1.xml
3) Your blog post permalinks have dates in them (onlineworkaura.com/2022/07/28/how-to/...) which is, arguably, an outdated practice. I personally would get rid of them and keep permalinks simple - domain.com/blog-title
4) On mobile, the hamburger menu icon in your header is barely visible (unless you scroll down) due to bad color contrast.
5) Please add a favicon, the grey placeholder globe icon that Chrome adds to webpages with no favicon hurts my eyes.
My 2 cents.