I can't honestly say that electric cars are that common where I live.
I wouldn't say electric cars are all that popular in my country.
どちらも「私の周りでは電気自動車は普及しているとは言えない。」という言い方です。
1) I can't honestly say that electric cars are that common where I live.
2) I wouldn't say electric cars are all that popular in my country.
「〜しているとは言えない」は
I can't honestly say ...
I wouldn't say ...
を使って言えます。
「普及する」は common や popular を使って表現できます。
ご参考になれば幸いです!