Is the PayPal live client id through the API to pass is secure?

Question

I have the PayPal development in my project.

In the frontend, I use:

    // data
    ...
    credentials: {
      sandbox: this.PAYPAL_SANDBOX_CLIENT_ID,
      production: this.PAYMENT.PAYPAL_LIVE_CLIENT_ID,
    },
    ...
    // template to use
       <PayPal :amount="amount"
              currency="USD"
              :client="credentials"  // there is the data.
              env="sandbox"

              :items="pay_items"
              >

Because the this.PAYMENT.PAYPAL_LIVE_CLIENT_ID is dynamic, some time it maybe changed.

so I want to through the API to pass the PAYPAL_LIVE_CLIENT_ID from backend to frontend, because I don't know whether the PAYPAL_LIVE_CLIENT_ID is secure if is transparent for everyone.

somebody can tell me about the live client id?
there maybe find some useful information.