What do you mean? your must elaborate the question.Nobody can able to understand what does your question mean if you really dont technically elaborate what is the issue.You can also share snapshots, code etc which also helps people to understand the issue you are facing.

ok do you know how to change the nameserver on namecheap?

just change the nameservers on namecheap for your domain is fine

Hello , I beleive you want to use vercels name servers instead of aws route53 name servers in your namechip dashboard. Its very easy since your domain provider is namechip you need to first delete aws route53 name servers in namechip dashboard and then setup your vercel's name servers in namechip. Either you can map namechip domain with vercel by using nameservers or you can map them with A, CNAME records too.. Then give some time to finish DNS propagation. Thats it!!!