I have run a Parker 2520XL for 15 years with two different engines originally 2005 Yamaha F225 for almost 2000 hours, now a 2019 Suzuki DF300APXX for 300+ hours. Almost every hour in the Atlantic Ocean. I know the boat very well have run in a very wide range of weather across 3 seasons. I bold faced your speed and that is the problem. You may have some less then optimum trim settings but even with perfect trim set, 25 knots in the ocean with a Parker 2520XL is too fast 99% of the time. Typical ocean cruise speed on all but the calmest of days is 20 knots , occasionally 22 but on many days 16-18 and sometimes 14. If you’re looking to run 25 knots consistently in the ocean, a Parker 2520XL is the WRONG boat for you and nothing you do will make it a 25 knot ocean boat.
No matter what you do with tabs or engine trim the boat is not for you.
I love my Parker 2520XL it’s a great boat for myriad of activities but a 25 knot cruise speed in the ocean is absolutely not one of them.
Get used to going slower or sell it.