Set a minimum order amount for checkout-PayPal payment gateway for WooCommerce (https://www.webtoffee.com/product/paypal-express-checkout-gateway-for-woocommerce/)

functions.php

<?php //do not copy this line
/**
 * Set a minimum order amount for checkout
 */
add_action( 'woocommerce_before_checkout_form', 'wc_minimum_order_amount' );
add_action( 'woocommerce_checkout_process', 'wc_minimum_order_amount' );
add_action( 'woocommerce_before_cart' , 'wc_minimum_order_amount' );

 
function wc_minimum_order_amount() {
    // Set this variable to specify a minimum order value
    $minimum = 50;

    if ( WC()->cart->total < $minimum ) { 

		add_filter( 'wt_show_paypal_express_button_in_cart_page', '__return_false', 99 ); 
		add_filter( 'wt_show_paypal_express_button_in_checkout_page', '__return_false', 99 ); 
		
        if( is_cart() ) {

            wc_print_notice( 
                sprintf( 'Your current order total is %s — you must have an order with a minimum of %s to place your order ' , 
                    wc_price( WC()->cart->total ), 
                    wc_price( $minimum )
                ), 'error' 
            );

        } else {

            wc_add_notice( 
                sprintf( 'Your current order total is %s — you must have an order with a minimum of %s to place your order' , 
                    wc_price( WC()->cart->total ), 
                    wc_price( $minimum )
                ), 'error' 
            );

        }
    }
}