if you have set up proper redirection (301 redirects) from the blocked domain to the new domain, search engines typically recognize this and pass the link juice from the old domain to the new domain. a 301 redirect is considered a permanent redirect and is the best way to ensure that link equity (link juice) is transferred. if you have properly redirected your old domain to the new one and ensured that search engines can still crawl the old site, the link juice from new backlinks should effectively transfer to your new domain and if the block also affects search engine bot you might need to address that by ensuring that the old site is still accessible to them or by directly building backlinks to the new domain
