https://go.dev/tour/generics/2 and worthy of a reference https://drgarcia1986.medium.com/playing-with-go-and-generics-bba6961b14a0

list.go

package main

import (
	"fmt"
)

// List represents a singly-linked list that holds
// values of any type.
type List[T any] struct {
	next *List[T]
	val  T
}

func (l *List[T]) ShowList() {
	current := l
	for current != nil {
		fmt.Println("The value is: ", current.val)
		current = current.next
	}

}

func main() {
	n3 := List[int]{val: 3}
	n2 := List[int]{val: 2, next: &n3}
	n1 := List[int]{val: 1, next: &n2}

	n1.ShowList()
}

the Tour isn't a hundred percent clear, Diego's site elaborates in depth.