Unfortunately, I do not have access. I've also tried the solution with one single .htacces file(in the root) but it is not working either:
RewriteCond %{HTTP_HOST} ^mobirom.ro
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteRule (.*) https://www.mobirom.ro/$1 [R=301,L]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(2)\.html$ /mese/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(6)\.html$ /scaune-curbate/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(3)\.html$ /mese-bar/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(5)\.html$ /scaune-bar/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(4)\.html$ /tabureti/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(7)\.html$ /seturi-mese-si-scaune/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(15)\.html$ /mobilier-lemn-curbat/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(9)\.html$ /masute-cafea/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(11)\.html$ /scaune-balansoar/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(13)\.html$ /mobilier-terasa/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(1)\.html$ /scaune/$1_$2_$3.html [L,R=301]
RewriteCond %{HTTP_HOST} ^en\.mobirom\.ro
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteRule (.*) https://en.mobirom.ro/$1 [R=301,L]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(2)\.html$ /tables/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(6)\.html$ /bent-chairs/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(3)\.html$ /bar-tables/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(5)\.html$ /bar-chairs/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(4)\.html$ /stools/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(7)\.html$ /table-chair-sets/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(15)\.html$ /bent-wood-furniture/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(9)\.html$ /coffee-tables/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(11)\.html$ /rocking-chairs/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(13)\.html$ /outdoor-furniture/$1_$2_$3.html [L,R=301]
RewriteRule ^([a-zA-Z0-9-]+)_(\d+)_(1)\.html$ /chairs/$1_$2_$3.html [L,R=301]
it seems that it it taking in the consideration the rules from the root only..
Thank you