can't increase swap space

[HJ_xman@localhost ~]$ free -m
              total        used        free      shared  buff/cache   available
Mem:           4926         873        2043          15        2009        3803
Swap:          2462           0        2462
[HJ_xman@localhost ~]$ swapon -s
Filename				Type		Size	Used	Priority
/dev/zram0                             	partition	2522108	0	100
[HJ_xman@localhost ~]$ dd if=/dev/zero of=/swap_file bs=1G count=1
dd: failed to open '/swap_file': Permission denied
[HJ_xman@localhost ~]$ sudo dd if=/dev/zero of=/swap_file bs=1G count=1
[sudo] password for HJ_xman:
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 3.68649 s, 291 MB/s
[HJ_xman@localhost ~]$ chmod 600 /swap_file
chmod: changing permissions of '/swap_file': Operation not permitted
[HJ_xman@localhost ~]$ sudo chmod 600 /swap_file
[HJ_xman@localhost ~]$ mkswap /swap_file
mkswap: cannot open /swap_file: Permission denied
[HJ_xman@localhost ~]$ sudo mkswap /swap_file
Setting up swapspace version 1, size = 1024 MiB (1073737728 bytes)
no label, UUID=62d068fc-03d8-4981-9d67-244e9831d5a8
[HJ_xman@localhost ~]$ cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Wed Mar 31 06:42:17 2021
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
UUID=9a6209be-1b02-4cc6-a2fa-f4adeecd266f /                       btrfs   subvol=root     0 0
UUID=a008e035-a35c-431f-93da-b0206361e436 /boot                   ext4    defaults        1 2
UUID=9a6209be-1b02-4cc6-a2fa-f4adeecd266f /home                   btrfs   subvol=home     0 0
/swap_file  swap  swap  defaults  0 0
[HJ_xman@localhost ~]$ swapon /swap_file
swapon: cannot open /swap_file: Permission denied
[HJ_xman@localhost ~]$ sudo swapon /swap_file
swapon: /swap_file: swapon failed: Invalid argument