Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
I have checked your site https://allstartechnologies.co.uk/ and it is set to index.
I have also checked your sitemap and robots.txt file and they both seem to be working fine. I also validated your sitemap on https://www.xml-sitemaps.com/validate-xml-sitemap.html and it validated just fine.
Can you please follow this knowledge base article – https://rankmath.com/kb/google-index/ and check if everything is set correctly on the site?
Also, have you submitted your sitemap in your Google Search Console? If not, please follow this knowledge base article to submit your site – https://rankmath.com/kb/submit-sitemap-to-google/
If you have submitted your sitemap, please check the coverage report under your Google Seach Console account to see if there are any errors shown, that might be causing the issue? This is so we can identify why Google refuses to index your site.

Please note that it is completely upto Google if they want to index or not index your website. So, if you haven’t willingly or accidentally made your page noindex and Google still isn’t indexing your page – it means that either Google doesn’t want to index or hasn’t crawled your page yet because it hasn’t allocated that much crawl budget to your website.
Please check this website for more details – https://www.searchenginejournal.com/definitive-list-reasons-google-isnt-indexing-site/118245/
Hope this helps.
Looking forward to helping you. Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.