Drop of when dies disappearing quickly

I explore it and die, then depending on the distance I can get there quickly, but there are times when I'm up to 6000 blocks, and when I get there, no matter how fast, the items all disappear, except the tinkers (which he neither washes and destroyed ), sometimes I don’t even die far, but it takes me a while to get there and it’s gone too, would I be able to increase the time? or just disappear when I close the server?

I could, but it makes the game too boring, why wouldn't you have that fear of dying, that care before mining, lots of things, so make it boring, I wanted it to last longer or stay there until I close it, it would be very useful , how would i do that? i really need it

know a mod? or plugin that you accept to put on my mod server?

sorry, i'm using the translator! Do you know if there is any mod, or if you could get a plugin on my server to drop items just disappear when closing the server?