While there aren't many platforms that offer free Doraemon movies in Hindi, you can try the following options:

In the end, they found the treasure, but instead of wishing for personal gain, Nobita wished for the happiness and well-being of his friends. Doraemon was proud of Nobita's selflessness, and their friendship grew stronger.

You can find some of these movies on:

(2010) – Underwater action with pirates and mermaids.