If you want to continue wearing your current speedos but want to show more package you could consider wearing a jockstrap or thong under your speedos.
There are jocks and thongs designed to push your package upwards and forwards making the most of what you have. Avoid natural fibres as they wil go soggy when wet.
Maybe something like this:
https://www.ebay.co.uk/itm/Men-Athle...item41c28cf136
or:
https://www.ebay.co.uk/itm/Mens-Brie...hFzo ooxXcG9g
or:
https://www.ebay.co.uk/itm/Camouflag....c100005.m1851