Turn off sha1WithRsa certificate

When I checked my domain security I see that I use 3 certificates:
|SHA 2 ECDSA|Managed by Cloudflare|
|SHA 2 RSA|Managed by Cloudflare|
|SHA 1 RSA|Managed by Cloudflare|

But people say that sha1WithRsa not secure. If its true, how Ill can turn off sha1.

If you’re on the Pro Business plan or above, you can disable SHA-1 support on the SSL/TLS app.

I have Pro plan, but I can`t see where I can disable SHA-1 support on the SSL/TLS app.

It’s Biz or above I believe…