The default Magento 2 gets certain limitation on promotion functionality. If online merchants want to create and run different promotion campaigns with free gifts, they will need an additional tool: Magento 2 Free Gift Options

Magento 2 Free Gift Extension will be a perfect tool for store owners to offer customers attractive gifts for free. Attract shoppers by various free gift options. Free gifts are attached with different items to increase the demand of purchase. Free Gift for Magento 2 is one of the best solution to help online merchants sell more and get more loyal customers.

Check prominent features:

- Offer free gifts on shopping cart
- Show gift products popup instantly
- Manually pick or re-select free gifts
- Select attributes for configurable gifts
- Show free gifts on checkout page
- (Updating) REST API & GraphQL supported
- Create multiple rules with flexible conditions for gifts
- Set valid activation time for rules
- Set automatically add free gift items
- Apply gift rules for specific customer groups
- Control the number of offered free gifts
- Enable/disable free shipping for gifts
- Offer discount code as gifts
- Set label, gift message & icon

Check more details at: https://landofcoder.com/magento-2-free-gift-extension.html/