Mailbox move requests stuck

The fact that they are at various stages means that the process itself appears to be working... you are  probably experiencing back pressure - https://docs.microsoft.com/en-us/exchange/mail-flow/back-pressure?view=exchserver-2019 

you can do two things about this
1) wait
2) customise your transport config files to allow greater resource usage - https://practical365.com/exchange-server/exchange-transport-server-back-pressure/ 

the one at 95% - do you perhaps have "wait on completion" enabled for that move?
get-moverequest <mailbox at 95%> | fl

if yes

Get-MoveRequest "Mailbox" | Set-MoveRequest -SuspendWhenReadyToComplete:$false
Get-MoveRequest "Mailbox" | Resume-MoveRequest
 

When I run the command get-moverequest <mailbox at 95%> | fl I get the following error;

Couldn't find a move request that corresponds to the specified identity 'jason'.
    + CategoryInfo          : NotSpecified: (:) [Get-MoveRequest], ManagementObjectNotFoundException
    + FullyQualifiedErrorId : [Server=MAIL2K16,RequestId=9ac88a51-fe37-4d16-9474-d74e9fede81b,TimeStamp=7/10/2020 1:35
   :40 PM] [FailureCategory=Cmdlet-ManagementObjectNotFoundException] 5C5380F7,Microsoft.Exchange.Management.Migratio
  n.MailboxReplication.MoveRequest.GetMoveRequest

Is there a way to delete or restart these requests and try again?

here are the event Id errors that are associated with this issue
mailbox-move-failure-event-id-s.rtf