PDLT

Dunno. What's "PDLT"? What does "harp passage" mean? (Guessing that's a special term for a score for harp?)

https://musescore.org/en/handbook/4/other-lines#line-properties

Musesscore can notate PDLT and Musesounds (https://www.musehub.com/muse-sounds/muse-harp) can provide a correct playback for it (https://production-v2.muse-cdn.com/library-user-guides/cba2663e-50d0-42…)
<< Pres de la table is accessible through the Staff Text feature. To apply a playing technique, first select the starting note for the technique, then assign Staff Text to it. Next, click on the speaker icon above the staff of the assigned note to open the Playing Techniques menu. From there, you can select the desired playing technique. >>