Add a Stripe of your choice.
2. After adding the Stripe of your choice, click on element and then click on + button to add a new element
3. Select Widget after clicking on + button
4. Now, Select PayPal from available widget
5. Add you registered PayPal email, Your Business Name, Default currency and Amount (In case you want to accept fixed amount) leave blank if you want to users to enter the Donation Amount.
6. Make sure to click on UPDATE button to save the changes.
7. You have now added the Donation button, your users can now Donate the money to you.
You can use the above method on any sections, blocks or stripes.