Under the 14th Amendment of the United States Constitution, can an Oregon State Inmate file a federal habeas corpus asking the United States Supreme Court to [vacate] a conviction under Ramos v. Louisiana in State case (prior 2020)?

When the state of Oregon will not allow or will obstruct an inmate from using State and Federal Remedies, can an inmate use the 14th Amendment to seek relief through federal habeas? [or] what can be an option / alternative?

When a Petitioner is approved by the Post- Conviction Court to proceed prose pursuant to United States Supreme Court ruling in Faretta v. California, do the rights attach to the claims, [or] does the post-conviction court have discretion to [ignore / or alter the claims]?

Does the Oregon State Department of Correction (State of Oregon) through its mail rooms have any discretion to make decision 's on opening "outgoing " legal and decide what will be filed on a Court by an inmate and what will not?

Can an Oregon State inmate file a federal habeas corpus petition to vacate a conviction under Ramos v. Louisiana?