my Website Doesn't Read backlinks

Hello,

i have 2 websites and took thousands of backlinks to them

first one the backlink can be showed at search console and ahrefs
second website : search console tells me that he has no backlinks and ahrefs also

i don't know why my website doesn't read backlinks

could anyone help me ?

What type of backlinks you got? Are they indexed links? At times, you have to wait for sometime for the links to get picked up.

Google cannot show up all the backlinks that you have done for your website nor a tool like ahref. Don't worry and keep building the backlink and you will meet the result.
Don't worry about what it sees but concentrate what you want to acheive.