redirect after moving blog

I moved my wp install from /blog/ to leaving the files in /blog/ but moving the index to / and updating all the files. Things work fine except i now get a 404 when trying to go to some pages

how can i 301 /blog/tag/* to /tag/*

here is what is in my .htaccess currently and not solving the issue.

#Controls eTags
Header unset ETag
FileETag None

#Blocks directory listing access if no index file present.
Options All -Indexes

ErrorDocument 404 /404.php 

RewriteEngine On
RewriteCond %{HTTP_HOST} ^www\.DOMAIN\.com$ [NC]
RewriteRule ^(.*)$ https://DOMAIN.com/$1 [R=301,L]  

# REDIRECT /folder/index.php to /folder/
RewriteEngine on
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^/]+/)*index\.php\ HTTP/
RewriteRule ^(([^/]+/)*)index\.php$ https://DOMAIN.com/$1 [R=301,L]

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [L]
</IfModule>

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /blog/index.php [L]
</IfModule>

# END WordPress