A fairly decent ebike (Bosch) will get you about 70 miles so long as you’re not razzing about on Turbo all the time. We did this route (Ijmudien to Delft; 70km) last year with about 40% battery left. This is with 2 kids and a bunch of camping gear too.
Got this unintentional comparison photo of 2024 > 2025 too: