Yes, You can get Free Royale Pass in PUBG Mobile by following ways:

Trick 1: You can Download Money Paying Apps and earn Money by watching and sharing videos, and Playing Online Games

For Ex: 4 ways to hack PUBG UC

Trick 2: You can Participate in Royale Pass Giveaway’s by some website on the Internet and complete some tasks and win Free Royale Pass 

For Ex: Royale Pass Giveaway

Steps: Steps to Participate in Giveaway

• Visit the Link
• Look at the bottom of the article
• Check the steps given and follow them
• Participate in Giveaway,
• Continue to Participate daily and increase your chance to win the Royale Pass.