The phrase "almost fully from" is correct and usable in written English.
It can be used to indicate that something originates primarily or mostly from a particular source, but not entirely.
Example: "The report is almost fully from the data collected during the last quarter."
Alternatives: "mostly from" or "largely from".
After 4 weeks of reperfusion, kidneys from the I/R 30 min group almost fully recovered from initial injury.
Across six discs, this box set gathers together key documents from those early years – and shows Parker's aesthetic almost fully formed from the beginning.
Thus, we have almost fully recovered from what we have agreed to call The Great Misfortune.
International travel to Hong Kong has almost fully recovered from the effects of the SARS outbreak, at least as judged by passenger traffic data released by Hong Kong International Airport.
Quarterback Steve McNair has almost fully recovered from a bruised sternum and running back Eddie George is one of the most intimidating offensive players in football.
The living cell layer of the epidermis (viable epidermis) showed greatest viscoelasticity – almost fully relaxing from shallow indentation – whilst the other layers reached a plateau after relaxing by around 40%.
Watching Handsworth Songs now (or Isaac Julien's 1984 film, Territories), one sees not just the articulation of a political position, or an emotion, but the emergence of an aesthetic that seemed to have arrived almost fully formed from the start, in several places and in different media, whose pleasures were matched only by their complexity and refusal of easy categorisation.
Observations on the performed experiments show matrix crack initiation and propagation in the skin and near the flange tip, causing the flange to almost fully debounded from the skin in some cases, interlaminar debounding and fiber breakage up to the failure of the components.
Consumer Happiness for Nike brands and products has almost fully recovered from the Kaepernick controversy.
