5330 - Filer Signature Electronic?

Hello my fellow pension geeks! I can't find this anywhere specifically mentioned, either in the 5330 instructions or on this board. Can the filer (not the preparer) sign the form electronically through something like DocuSign? The 5330 instructions do not say either way. The 5330 is also not listed on the irs.gov website as allowing electronic signatures for 2021. However, it would greatly help out for a project I'm working on. 

Please let me know your thoughts or share a resource I may have overlooked. Thank you kindly!