Paste your AnswerScan fixes into Wix
robots.txt
Site & SEO → SEO → Robots.txt Editor: apply the AFTER lines from your fix pack.
JSON-LD
Settings → Custom Code → Add code to Head: paste your schema inside <script type="application/ld+json">…</script>, apply to all pages.
llms.txt
Wix doesn't support root-level custom files. Honest note: skip it (6/100 points) and put the effort into the schema and FAQ.
FAQ block
Add an Embed → Custom Embeds → Embed HTML element to your page and paste faq.html. FAQ schema goes in Custom Code (Head) like the JSON-LD.