Prudence dictates that the answer is ‘yes.’
There is no question that Anglican baptism is valid in the eyes of the Catholic Church. But as a result of Anglican history, there is (in the Catholic view) prudent doubt about the validity of any particular ordination, because of the lack of valid apostolic succession.
When Henry VIII demanded that the Catholic Church annul his marriage to Queen Catherine of Aragon; Pope Clement VII refused. Henry respond by compelling Parliament to pass the the Act of Supremacy, declaring him the one and only supreme head on earth of the Church in England. With one exception, all the bishops in England went along with this, giving an Oath of Supremacy to Henry’s rule. This did not erase their valid ordained state, but it placed them in schism with the Catholic Church.
When Henry died, his son Edward VI (then nine years old) gained the throne. Edward Seymour was installed as regent, and made 1st Duke of Somerset; he continued the attacks on clergy. The liturgy was reworded and replaced, with a new ordinal having Protestant ministers replacing priests and all the sacraments being redefined and reworded. At this point, the Church of England became not simply schismatic but invalid. Any “ordinations” done under these forms were not simply without permission, but not at all valid.
Edward’s death at age 15 saw a slight reversal of the trend. He and his court had attempted to ensure that Lady Jane Grey, a Protestant, would inherit the throne, but the widespread attacks against the forms and rituals of the Church had not been popular, and she held the throne for less than two weeks before being deposed by Mary I, Edward’s half-sister. She attempted to restore Catholicism, repealing the Protestant laws that were passed by Henry, and restored union with Rome. Ordinations that took place subsequent to this were valid.
When Mary died childless, however, the succession fell to her half-sister Elizabeth I, who was Protestant. Elizabeth renewed her father’s Oath of Supremacy, and restored the changed ordinals and texts for sacraments that Edward had promulgated. This time, many bishops did not go along. When Elizabeth elevated Matthew Parker to the position of Archbishop of Canterbury, none of the four co-consecrators were valid bishops in the eyes of the Catholic Church.
The line of bishops succeding from Parker is, then, void in the eyes of the Catholic Church, and (with one possible exception as the result of a possibly apocryphal visit from an Eastern Rite bishop who may have ordained some bishops) the Anglican Church does not have a valid line of Apostolic succession, even though it’s possible that some individuals may be validly ordained. But since there’s no way to know, the prudent choice with such priests is to conditionally ordain them. This recognizes that the Sacrament of Orders can only be given once, and if it was validly given before has no effect this time, but if it was not, validly confers it now.