Expanded root volume but tmpfs and devtmpfs is limited

I have expanded root volume in my Amazon ec2 machine (Amazon Linux 2) but the space in tmpfs and devtempfs is still limited.

Here is what output of df -h command looks like:

$ df -hFilesystem      Size  Used Avail Use% Mounted ondevtmpfs        7.9G     0  7.9G   0% /devtmpfs           7.9G     0  7.9G   0% /dev/shmtmpfs           7.9G  468K  7.9G   1% /runtmpfs           7.9G     0  7.9G   0% /sys/fs/cgroup/dev/xvda1      100G  8.1G   92G   9% //dev/xvdb        60G  4.3G   56G   8% /datatmpfs           1.6G     0  1.6G   0% /run/user/1000

What's the safest and quick way to fix this?