Not surprising that you feel upset, OP, but 2 weeks will soon be gone - do enjoy your first cuddle! And many congratulations on your new little grandchild.
Even before Covid was a factor, if MN is anything to go by, many new parents are now very precious about anyone, even grandparents, visiting for the first couple of weeks, or even a month, in case it interferes with their ‘bonding as a little family’. More often with first babies, though - I suspect that most aren’t nearly as fussy with 2nd or subsequent babies.
I know some visitors can be a pain, esp. if they’re the type who come empty handed instead of bringing meals, or just sit there expecting to be given cups of tea, but such people can usually be tactfully put off.
I’m so glad my dd was never precious about it - rather the reverse. We were there within hours after all 3 of hers - last was born in early January and it was only just over an hour before dh and I, plus the two little elder Gdcs, were enjoying cuddles in the hospital.
It was very hard not being able to see or cuddle the wee new one for so long during lockdown though.