When you pass price value phtml to js , you need to display price with currency from js.

Use ‘Magento_Catalog/js/price-utils’ priceUtils Js object in your custom javascript file to set currency to price.

Then add getFormattedPrice() function in your file to display currency symbol with price from javascript.

define([
    'ko',
    'Magento_Catalog/js/price-utils'
], function (
    ko,
    priceUtils
) {
    'use strict';
    return {
        /**
         * Formats the price with currency format
         *
         * @param {number}
         * @return {string}
         */
        getFormattedPrice: function (price) {
            var priceFormat = {
                decimalSymbol: '.',
                groupLength: 3,
                groupSymbol: ",",
                integerRequired: false,
                pattern: "₹%s",
                precision: 2,
                requiredPrecision: 2
            };
            return priceUtils.formatPrice(price, priceFormat);
        }
    }
});