I need advice for power cords

Buy some Marinco or Wattgate IEC plugs.

Buy some TechFlex sleeving and 3M heatshrink.

Go to Home Depot, Lowes or the Big Box store or your choice and buy some 12/3 SJOOW wire:

https://www.homedepot.com/p/Southwire-250-ft-12-3-300-Volt-CU-Black-Flexible-Portable-Power-SJOOW-Cord-55808745/205562565

https://www.hawkusa.com/manufacturers/marinco/connectors/320iec15?gclid=Cj0KCQiAhojzBRC3ARIsAGtNtHXBudF2V7uqDjuwceKHbTNQZWXiZt8mYrbYxMnpmQ834rDB5XT8BMYaAkLbEALw_wcB

These are fine too:

https://www.homedepot.com/p/Legrand-Pass-and-Seymour-20-Amp-250-Volt-Plug-PS5466XCCV4/202664478

Assemble.

There you go...now you have cords that equal the best wiring you have in your house that feeds your gear (12 AWG Romex if you are lucky into a 20Amp circuit; you may only have 14AWG into a 15 Amp circuit). Numbers I referenceed are for USA wiring. International 220V wiring may vary, but nevertheless the concept is similar: The fallacy that a magical cord in the last 6 to 10 feet from your wall outlet to your gear will make an audible difference is...snake oil. Make your component cords the same AWG as your circuit and you have done the best you can.

Now I'm really going to start a fight.  These are fine too if you don't want to build anything.  These likely will equal or exceed your building's wiring capability.  No expensive cable will sound any better than these.  The laws of physics defy anything to the contrary unless you are no-kidding running a 10 gauge or larger circuit to your gear:

https://www.sweetwater.com/store/detail/PWIECB10--daddario-planet-waves-iec-to-nema-plug-power-cable-10-feet?mrkgadid=3336040252&mrkgcl=28&mrkgen=gpla&mrkgbflag=0&mrkgcat=accessories&acctid=21700000001645388&dskeywordid=92700046934850275&dsproductgroupid=681239669995&product_id=PWIECB10&lid=92700046934850275&ds_s_kwgid=58700005287207515&ds_s_inventory_feed_id=97700000007215323&prodctry=US&prodlang=en&channel=online&storeid=%7Bproduct_store_id%7D&device=c&network=g&matchtype=&locationid=%7Bloc_phyiscal_ms%7D&creative=342707492128&targetid=pla-681239669995&campaignid=1465808365&gclid=Cj0KCQiAhojzBRC3ARIsAGtNtHWdWXJZvOr21sD0D75pd6kkcdS78yoYVtyrqjTBrDOjrZt1jCvDmq0aAu4iEALw_wcB&gclsrc=aw.ds

Also...your best bet is to spend your money on a dedicated circuit for your audio gear - that will get noisy things like fluoresecent lights and vacuum cleaners and hairdryers off your "audio only" circuits. Also consider a power conditioner that will kill any line noise and break ground loops. I run PanaMax.

# 1 Priority - “FIX” YOUR ROOM

Any high quality Green Dot Hospital grade cord will do a very good job. The Pangea's are also a great bang for the buck. With power cords you start running into the law of diminishing returns very quickly...

My 30 buck Jelly Fish Green Dot is way better then the $200 Patrick Cullen AC cable it replaced....

Also what is everything plugged into. Upgrading Hubble outlets to Hospital grade or better is also a huge help.

You can always go Battery power/DC if you really want to spend money....

A shout-out to roberjerman.  You have a very limited knowledge of high-fidelity components,and cables.Remember,your system is only as good as it's weakest link.If you say power cords are just like expensive jewlery,then I guess we know where your weakest link is!