Granted that scrolls and some magical items are imbued with the necessary PPE, but this does not mean they can be used by all and sundry. Cyborgs, full or partial, can't use TW items for example (RUE pg 47).
I would presume that, particularly without any exotic life essence stuff, all the man-made materials and circuitry of a robot has the same devastating effect on using magic as bionics.
However, ignoring that...
Book of Magic, pg 9, emphasis added
Magic takes many forms. One must never forget that so-called "magic" energy is a force of nature the same as fire, electricity, microwaves, and nuclear energy, among others. As such, it is drawn upon by living creatures, channeled, shaped and used in whatever way that individual desires. Thus, it can be used for good or evil. To build or destroy.
SB1r, pg 14, emphasis added
A.l.s and N.l.s do not register as a living presence, they cannot be affected by psionics, have no biological aura, no P.P.E. or I.S.P., or any other aspect attributed to organic life.
... Like the ability to use magic.
Pretty definitive. We could stop there, but it is already really late so let's go down a couple rabbit holes.
SB1r, pg 14
[The Transferred Intelligence] will have a small amount of detectable P.P.E. (though never enough to be a spell caster).
The minimum PPE required to cast a spell is 1 PPE for Blinding Flash.
However, based on the clarification in WB28 pg 74-75, those who have more than 10 PPE can use TW items. So if your TI has more than 10 PPE for some reason, interpret as you will.
BoM pg 74, using Transference of Essence & Intellect on a robot body says nothing about transferring the ability to use magic, only skills, memories, personality, etc.
See
https://palladium-megaverse.com/forums/viewtopic.php?f=39&t=137425 for suggestions of using TW in the robot design, using alien robots from another dimension, and organic artificial intelligences.
HOWEVER, scrolls are quite a simple way of using magic if neither magically or psionically empowered, like a housewife apparently. Any robot less than TI is definitively neither magically or psionically empowered.
BoM pg 140, the Create Magic Scroll spell says expressly that anyone can read a scroll aloud and it will work. The spell goes on to say "
No camera of any kind (emphasis added) can photograph/record the mystic writing". The word "photograph" implies a static image of the scroll, though digital cameras convert an image to electrical impulses. A camera may also capture a "record" that is video in nature, but a record also implies some degree of persistence. Robotic eyes are obviously cameras of a sort, but when reading, are robotic eyes doing anything different than what organic eyes would do? Not really. So robots can read scrolls?
Nightbane WB3 pg 8, the author speaks of magic as
...bits of peoples' minds, which have been torn out and battered into an unnatural shape. We aren't talking about dull mystical energies any more. Now we're talking about abused fragments of peoples' minds. Semi-living structures (emphasis added) which might feel, learn, grow, evolve ... rebel... and who knows what else.
Not Rifts canon, but Nightbane canon. However, if this is adopted in your game, it means either a) robots can't do magic because they have no means to comprehend semi-living structures as non-living entities themselves, or b) they can because the semi-living structure is what the scroll's creator imparted through the PPE.
The implication though for the latter option is that text-to-voice software, like what is probably in CS body armor, may cast magic from a scroll.
Another implication for the latter option is that of magic rebelling - there may be a best before date on scrolls before things go terribly wrong.
Bottom line: Depending on how you and your GM interpret the above, for anything less than a TI, it would likely, possibly, maybe require a truck-load of handwavium outside the bounds of canon to have robots use magic scrolls and items.