Recently there has been a lot of changes in the PR industry and to be honest, press releases aren't all that important anymore. Yes, it's true that press releases get syndicated so that the same exact text gets spun out far and wide into the corners of the internet (including translations into some different languages at times), but it won't bring your campaign the support it needs to succeed.
The thing that matters most now for PR is to get the word out there about your campaign to the right outlets.
This means doing the legwork and finding the most relevant online places (since people who are your audience frequently reads it) and the most relevants journalists tol write about your (since they've written about similar projects in the past). I write a really detailed step-by-step guide (7,000 words) on how to do this here:
https://crushcrowdfunding.com/the-crowdfunding-pr-strategy-that-works-2019-and-beyond/Beyond that, getting press to write about you is also more about being able to SHOW to your audience that yes, this project is legitimate. So legitimate that even journalists are writing about it and putting their name (and reputation) on the line to talk about the project! You'll be able to include those press logos (from the outlets) on your page, to show people that yes, this campaign is the real deal.
So in sum - press releases won't take you far, the thing that will help catapult your campaign to success is getting your campaign to the right people in the right places.
Best of luck!