Hello Aspirant,

You can get NEET UG 2021 question papers and sample papers for all codes from the links given below along with their solutions and answers :-
https://medicine.careers360.com/articles/neet-sample-paper
https://medicine.careers360.com/articles/neet-question-paper

Now if you are done with your NEET UG 2022 syllabus which is mentioned below then you should aim for solving more and more sample papers as well as PYQ papers because it will improve your time-management and boost your self confidence for actual examination :-

@Physics  
Physical World and Measurement
Kinematics
Laws of Motion
Work, Energy and Power
Motion of System of Particles and Rigid body
Gravitation
Properties of Bulk Matter
Thermodynamics
Behaviour of perfect gas and kinetic theory
Oscillation of waves
Electrostatics
Current Electricity
Magnetic effects of current and magnetism
Electromagnetic induction and alternating currents
Electromagnetic waves
Optics
Dual Nature of matter and radiation
Atoms and nuclei
Electronic devices

@Chemistry
Some Basic Concepts of Chemistry
Structure of Atom
Classification of Elements and Periodicity in Properties
Chemical Bonding and Molecular Structure
State of Matter: Gases and LiquidsThermodynamics
Equilibrium
HydrogenS-block Element
Some p-block Elements
Organic Chemistry
Hydrocarbons
Environmental Chemistry
Solutions
Chemical Kinetics
Surface Chemistry
General Principles and Processes of Isolation of Elements
D and F Block Elements
Coordination Compounds
Haloalkanes and Haloarenes
Organic Compounds Containing Nitrogen
Biomolecules
Polymers
Chemistry in Everyday life

@Biology
Diversity in Living world
Structural Organization in Animal and Plants
Cell Structure and Function
Plant Physiology
Human Physiology
Reproduction
Genetics and Evolution
Biology and Human Welfare
Biotechnology and its applications
Ecology and Environment

For more details go through the link given below :-
https://medicine.careers360.com/articles/neet-syllabus

You can also solve the Test series for NEET 2022 for better finishing of your preparation, you can get the Test series from the link given below :-
https://learn.careers360.com/test-series-neet-may/

I hope this information helps you.
Good Luck!!