Subdomains are typically indexed by search engines as separate sites, so they may not inherit deindexing issues from the main domain. However, for best results, it's wise to maintain a moderate publication frequency, avoid excessive linking between the main domain and subdomains, and ensure each subdomain has unique content. This approach increases the chances of independent indexing, but addressing the root issues of the main domain's deindexing remains the best long-term strategy to mitigate future risks