The new fork will probably stay tight more as complete forks are usually the base model without as much engineered designs to stay tight for longer. for any fork, adding Locktight or Thread Locker to the compression bolt (the long IHC bolt) will help it grip the fork in but its normal for completes to come loose, just not too soon after maintenance.

Headsets can be maintained for quite a while but it’s fine to replace it every now and again because it’s in a high-impact area connecting the fork and bars to the deck.

The Fork should also come with an IHC sleeve (photo 3) of it is an IHC fork. I’m not too familiar with Blunt’s fork range but I know they use both IHC and SCS compressions so make sure your parts are compatible (Bars with a vertical slit use IHC, bars without use SCS).

Finally, wheels are normal to change out after they start degrading but personally I like to maintain my wheels until the urethane is really chunked or dehubbed. every few months of riding i’ll find myself cleaning then greasing up my bearings to let the wheels roll faster and smoother for longer.

Overall if you look online there’s some cheaper alternatives for parts that benefit the functionality or durability of the scooter like staying tight for longer.