The fall of the Western Roman Empire stretched over many years or decades, but are there any accounts written by Romans that were living outside of Rome proper? Maybe a soldier or official stationed in Gaul or Spain dealing with local issues while Rome (and the Empire) is collapsing? I'm curious about their perception of the events and what the possible plan was to get home or if they felt abandoned and had to assimilate with 'the locals'.
While I suppose most of the possible research theme (contemporary perceptions of the people in WRE provinces on course of events in the 5th century) suggested in OP are indeed valid points of view, the sack of Rome in 410 might be not a so proper example to examine their perceptions of the changing atmosphere.
As for more general trends (especially on the contemporary observations in different provinces on the alleged "fall of WRE in 476", I'd instead suggest to check the following previous posts:
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Then, why I said above that the sack of Rome is perhaps a so proper example of the event?
In fact, the majority (or almost all) of often cited sources in length on the event are not direct witnesses authored by those who was staying in Rome in 410 - Orosius (around) 417, Socrates (about 440), Sozomen (about 440), Zosimus (450), and Procopius (6th century). None of them had been present in Rome during the course of the sack itself, and except for Orosius, they wrote almost after a generation after the sack, and in ERE (Eastern Roman Empire). In other words, the narrative of Orosius is already a kind of observance as well as record of hearsay out of Rome.
Some other famous contemporary authors like Augustin and Jerome also refer to the sack either in their work or in letters, but they were also not living in Rome in 410. Especially the latter's letter are famous for its dramatic narrative of the pillage, but recent researchers tend to rather wary of his rhetoric (van Nuffelen 2015: 326).
There are certainly also other local historical writings in the 5th century, but I'm afraid that their description tend be too concise to draw any meaningful conclusion.
The followings are two examples of such local historical writings:
Overall, recent studies on Late Antiquity tend to relativize the contemporary significance as well as the possible damage of the event in 410, in contrast to apparently visual and shocking narrative of Jerome and Orosius.
On the other hand, while he did not tell much about the sack itself, however, there is one more very interesting contemporary source: Latin poem de Reditu by Rutilius Claudius Namatianus. Rutilius had had been (corrects:) an official in Rome when the sack(s) occurred and also became the governor (prefect) of Rome (praefectus urbi) later in 414, and his poem based on his observation on the surroundings on the northern Italian coasts when he later returned from Rome to his home in southern France in 417.
The text from the old Loeb bilingual edition (Latin/ English) of Rutilius' de Reditu is also available online: https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Rutilius_Namatianus/home.html
In 2004, Italian film director Claudio Bondi also made the film called Il ritorno/ De Reditu (English title: The Voyage Home) (linked to imdb), featuring Rutilius' returning voyage roughly based on the namesake poem. This film has also apparently been dealt with the study on historical films.
References:
(Edited:) corrects the rank of the office of Rutilius in early 410s.