Without knowing the level of detail you need you can try the Okta usage report.

Reports > Click first report 'Okta Usage'

Here you can specify the range and scope to a specific group or leave it blank and get all users in the tenant. This should at least give you all your users and their statuses.

For more advanced reports, we use https://github.com/gabrielsroka/OktaAPI.psm1

See the CallOktaAPI.ps1 for examples

But for illustration we use the script below to export the groups.

(and we have scheduled this kind of scripts everyday to create a "snapshot" of groups, accounts and applications)

#Install-Module OktaAPI # [1]

#Install-Script CallOktaAPI # [2]

Connect-Okta -Token "xxxxxxxxx" "https://xxxxxx.okta.com"

#Export all users to a csv-file

 $totalGroups = 0

  $exportedGroups= @()

  # for more filters, see https://developer.okta.com/docs/api/resources/users#list-users-with-a-filter

  $exportFile = "C:/Tasks/Exports/$((Get-Date).ToString('yyyyMMddHHmm'))-OktaGroups.csv"

  do {

    $page = Get-OktaGroup $params

    $exportedGroups += $page | Select-Object *, @{n='name';e={$_.profile.name}}, @{n='googleExternalId';e={$_.profile.googleExternalId}}, @{n='samAccountName';e={$_.profile.samAccountName}},@{n='groupType';e={$_.profile.groupType}},@{n='dn';e={$_.profile.dn}},@{n='objectSid';e={$_.profile.objectSid}}

    $params = @{url = $page.nextUrl}

  } while ($page.nextUrl)

$exportedGroups | Export-Csv $exportFile -notype