Is there a plugin for automatically adding a word or symbol after a trigger word? I.e. Like a search and replace but more like search and add? [closed]

This would run a find-and-replace on displaying the title and content field:

function wpse_406537_search_replace( $content ) {
    $company_name="The Company";

    $company_name_regex = preg_quote( $company_name, "https://wordpress.stackexchange.com/" );

    // Best-guess attempt at replacing company name that doesn't yet have ™️
    // e.g. The Company[space]
    // e.g. The Company.
    // e.g. The Company,
    // e.g. The Company[end of string]
    $content = preg_replace(
        "/$company_name_regex( |\.|,|\$)/i",
        "$company_name™️",
        $content
    );

    return $content;
}

add_filter( 'the_content', 'wpse_406537_search_replace' );
add_filter( 'the_title', 'wpse_406537_search_replace' );