You seem to be facing two problems here:
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To tie the rolled note into a stinger without the trem on the stinger.
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To create a playback for the l.v. on the stinger.
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I maintain that in spite of how engravers have interpreted what was once handwritten, the “tie” to the stinger should actually be a slur; many, if not most here, disagree, so one will have to be satisfied removing the final trem bars in Engrave until Dorico offers another option.
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Even if the stinger eighth were untied to the original roll, would the l.v. play back? I’m not sure l.v.'s have a playback programmed in (otherwise how would Dorico know how long to sustain the l.v.); so I imagine one would have to program/extend the l.v.'s by hand.