How can I merge all duplicated contacts at same time?

First of all big thanks for everyone on this sub as it is one of the most helpful SR among all others here on Reddit.

So my problem is that many contacts are saved up to 12 times & I know how to merge them one by one but that would take forever.

Before there was an option right below my name card that the phone found like 300 duplicated contacts & asked if I would merge them. Now that's not there anymore.

Is there anyway to solve it. [iPhone 13 with 16.4.1 (a)]

Many thanks in advance. Screenshot as an example.

First of all big thanks for everyone on this sub as it is one of the most helpful SR among all others here on Reddit.

So my problem is that many contacts are saved up to 12 times & I know how to merge them one by one but that would take forever.

Before there was an option right below my name card that the phone found like 300 duplicated contacts & asked if I would merge them. Now that's not there anymore.

Is there anyway to solve it. [iPhone 13 with 16.4.1 (a)]

Many thanks in advance. Screenshot as an example.