This might work for hibernation:

  disko.devices = {
    disk = {
      nvme0n1 = {
        device = "/dev/nvme0n1";
        type = "disk";
        content = {
          type = "gpt";
          partitions = {
            boot = {
              priority = 1;
              start = "34s";
              end = "2047s";
              type = "EF02"; # for grub MBR
            };
            ESP = {
              priority = 2;
              start = "2048s";
              end = "2099199s";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
              };
            };
            luks = {
              priority = 3;
              start = "2099200s";
              end = "100%";
              type = "8309";
              content = {
                type = "luks";
                name = "crypted-nvme0n1";
                settings = {
                  allowDiscards = true;
                };
                content = {
                  type = "lvm_pv";
                  vg = "nvme0n1";
                };
              };
            };
          };
        };
      };
    };
    lvm_vg = {
      nvme0n1 = {
        type = "lvm_vg";
        lvs = {
          # LVs are created in alphabetic order for some reason
          # Prefixing them with a letter like this ensures desired creation order
          a_swap = {
            size = "64GiB"; # equal size to maximum available RAM
            content = {
              type = "swap";
            };
          };
          z_data = {
            size = "100%FREE";
            content = {
              type = "zfs";
              pool = "root";
            };
          };
        };
      };
    };
    zpool = {
      root = {
        type = "zpool";
        rootFsOptions = {
          compression = "lz4";
          "com.sun:auto-snapshot" = "false";
          mountpoint = "none";
          reservation = "16G";
        };
        postCreateHook = ''
          zfs snapshot root@blank;
          zfs snapshot root/nixos@blank;
          zfs snapshot root/nix@blank;
          zfs snapshot root/home@blank;
          zfs snapshot root/persist@blank
        '';

        datasets = {
          nixos = {
            type = "zfs_fs";
            mountpoint = "/";
            options.mountpoint = "legacy";
          };
          nix = {
            type = "zfs_fs";
            mountpoint = "/nix";
            options.mountpoint = "legacy";
          };
          home = {
            type = "zfs_fs";
            mountpoint = "/home";
            options.mountpoint = "legacy";
            options."com.sun:auto-snapshot" = "true";
          };
          persist = {
            type = "zfs_fs";
            mountpoint = "/persist";
            options.mountpoint = "legacy";
            options."com.sun:auto-snapshot" = "true";
          };
        };
      };
    };
  };

But be aware of zfs#12842 - make Linux hibernation (suspend-to-disk) more robust and nixpkgs#208037 - nixos/zfs: mitigate data loss issues when resuming from hibernate

You might also need these to enter the danger territory (make yourself familiar with zpool recovery strategy):

  boot.zfs.allowHibernation = true;
  boot.zfs.forceImportRoot = false;
  boot.zfs.forceImportAll = false;

                    "/swap" = {
                      mountpoint = "/.swapvol";
                      swap.swapfile.size = "20M";
                    };

https://github.com/nix-community/disko/blob/2bf3421f7fed5c84d9392b62dcb9d76ef09796a7/example/luks-btrfs-subvolumes.nix#L57-L60

Is this a swap partition or a swap file?