Theorethically, yes.
Practically, troublesome. Phono signal(s) are MUCH lower in level than line level (tuner, CD, etc) - and by nature signal lines can not be shielded as well as with line level - leading to susceptibility of hum and radio frequency interference. To combat these, the best strategy is to use star grounding - the centre being input of your phono preamp.
If you connect "miles and miles" of cable, Y splitter etc, you might "get away with murder" - but may not. That is why I NEVER saw phono preamp with multiple outs; inputs yes, vintage gear many times has inputs for at least two turntables, usually one for MM and another for MC, but can be multiples of MMs also. Multiple phono outs - NONE so far.
*IF* I needed such capability, I would use Y splitting of one sort or another AFTER some buffer stage; you might be lucky to use tape out (same point as phono out, preamplifier line stage input ) ( in case of only one tape out, use Y RCA splitter there ), but more prudent strategy would be at the line stage preamp output. Each and every installation is different, one cable may work in one and cause unsurmountable problems in another system and combination of componentry.
Doable - but i DO wish you good luck with this one !