Hello & welcome to the forum.
Your Panda being a 2011 car will have an interference engine as it has variable valve timing which the 1.2 8v FIRE engine has had since the introduction of the new Fiat 500 in 2007 so I would look into having the belt & water pump changed, although a family friend has a mk3 131 1600cl which he has owned since about 3 years old & is still on its original cambelt at 90k. Shop4Parts I find are the best suppliers for my Panda & my dad's Punto. The FIRE engine is in my opinion one of the best engines ever produced although they differ slightly from the original 1985 design they are still cheap to maintain, reliable & can be quite nippy, I much prefer the FIRE with the 8v head rather than the 16v Super FIRE as I had a Bravo 1.2 16v & found it rather gutless compared to the 8v & also quite bad on fuel. Although these engines are very tough & durable there are a few things to look out for.
1) rotten sumps as they are not the best metal in the world, plenty of aftermarket choices for these engines & quite cheap
2) on the 8v the thermostat housing where the coolant hose connects to the housing the pipe adapter is plastic, (the 1.4 16v is metal) & over time goes brittle & eventually snaps off dumping coolant everywhere leading to potential head gasket issues if your not quick to turn the engine off, early warning signs to change the thermostat will be a red powdery residue where the hose joins the housing. Quite cheap if you change it after seeing the warning sign
3) the breather hose that runs round the back of the air filter housing can break again quite cheap.
4) Rear beams on Panda's & 500's do tend to corrode but replacements are dirt cheap & most come with new bushes installed
5) They have a bit of a reputation for head gasket issues although I've never had issues with them I think it all depends how well they have been maintained.
I think thats about it, the Panda will serve you very well if you look after it even with the common issues above all of which are minor & relatively inexpensive should be fine for many years , I have a newer 319 Panda which under the body is exactly the same car, I bought new 4 years ago & have never had any issues with it, the only thing was being Euro 6 the low end torque wasn't very great at first but has freed up now & is much better. My Panda has never been into a garage for repairs or servicing even when in warranty period, I brought the genuine parts & me & my dad serviced the car on the drive, even tyre changes get done at home. Only time it goes in is for MOT which it passes with flying colours as I always check it over just before & do a lot of preventative maintenance which helps.