See the sidebar code. It's a good example.

vendor/magento/module-checkout/view/frontend/layout/checkout_index_index.xml

vendor/magento/module-checkout/view/frontend/web/js/view/summary

See the sidebar code. It's a good example.

vendor/magento/module-checkout/view/frontend/layout/checkout_index_index.xml

vendor/magento/module-checkout/view/frontend/web/js/view/summary

Example:

1. Get Payment from quote Magento_Checkout/js/model/quote: quote.paymentMethod(). See here: vendor/magento/module-checkout/view/frontend/web/js/action/select-payment-method.js

2. Shipping Address and Billing Address: quote.billingAddress() and quote.shippingAddress().

3. Quote items data: quote.totals().items

Can read more here: https://magento.stackexchange.com/a/133732/33057