Topeak do a no-loss valve you can put on any pump – have done for years and it’s not expensive.
As for shock pump – Topeak – works perfectly and has a no loss valve.
As for using a tyre pump – won’t work as your forks have a very small volume so you need a small accurate pump that can do high pressures. A road pump could technically work but you need a gauge and ideally an air release button to get the pressure right as if you try and connect a gauge you will let most of the air out as the volume is so small. And likewise you can’t use a shock pump on tyres as it will take too long and put lots of wear on your shock pump.