Second what others have recommended
Uno alloy stems
RideNow TPU tubes (36g in use, 24g waiting to try)
YBN chains (all my bikes run waxed YBN chains, including run about ratbike)
Rhinowalk bags (gym, handlebar, top tube and seat roll in use, quality is excellent)
XXX copy bottle cages (no worse at scratching bottles than other brands and more reliable than other brands, ie don’t break or eject bottles)
To add
Uno alloy handlebars, both road and gravel and my flared gravel bar has seen abuse.
MZYRH flat pedals
Wellgo red cleats (exactly the same as Favero and Powertap cleats)
Zeray ZP-110 look keo compatible pedals
AOlikes headband, sits under your helmet and silicone gutter stops sweat getting in your eyes.
TPU folding flask - make your own gels 250ml worth and stick it in your back pocket
Generic HR bands for Garmin HR, a consumable product but lasts as long as gamins, cheaper and comes in a range of colours.
Generic alloy computer mount (Garmin or Wahoo) with GoPro mount underneath that mounts to your handlebar with hinge.
Deemount tubeless sealants injectors
Deemount side loading bottle cages
Cheji cycling kit (just need to be aware pricing fluctuates madly)
To avoid
Generic alloy computer mount that mounts to your stem with two bolts, cracked too many to recommend
Plastic computer mount with GoPro mount underneath that mounts to your handlebar, again cracked too many.
Replica/copies/cheap cycling kit, especially bibs with the multicoloured 5D pads.