James Harden had the most games with 40+ points in 2019-20, with 21 games.

Interpreted as:

most 40 or more point games by a player in 19-20 season

NAME	GP	PTS	SEASON	TM	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	REB	AST	STL	BLK	TOV	PF	+/-
James Harden	21	977	2019-20	HOU	38.9	46.5	7.7	7.8	1.8	1.1	4.5	13.5	27.9	48.3	6.5	15.4	42.0	13.1	14.8	88.7	817	162	163	38	24	95	70	+264
Trae Young	11	490	2019-20	ATL	40.4	44.5	4.6	10.0	1.0	0.3	5.6	13.0	25.9	50.2	5.7	12.3	46.7	12.8	14.7	87.0	444	51	110	11	3	62	21	+44
Damian Lillard	11	558	2019-20	POR	41.1	50.7	5.3	9.1	1.4	0.2	2.6	15.9	28.5	55.9	8.2	15.0	54.5	10.7	11.5	93.7	452	58	100	15	2	29	13	+88
Bradley Beal	10	456	2019-20	WAS	39.5	45.6	3.7	6.3	1.5	0.3	4.1	15.3	27.5	55.6	4.2	8.9	47.2	10.8	12.4	87.1	395	37	63	15	3	41	29	-12
Zach LaVine	6	260	2019-20	CHI	37.9	43.3	6.7	3.3	2.0	0.3	3.7	16.7	28.0	59.5	6.5	12.0	54.2	3.5	4.7	75.0	227	40	20	12	2	22	15	+10
Luka Doncic	5	206	2019-20	DAL	35.8	41.2	9.2	11.0	0.6	0.2	4.2	13.2	25.0	52.8	3.8	10.8	35.2	11.0	14.0	78.6	179	46	55	3	1	21	18	+67
Anthony Davis	5	219	2019-20	LAL	36.8	43.8	12.2	2.8	2.6	1.2	1.4	14.0	25.0	56.0	1.6	4.2	38.1	14.2	15.4	92.2	184	61	14	13	6	7	12	+65
Russell Westbrook	4	167	2019-20	HOU	39.7	41.8	8.0	6.3	1.5	0.0	6.3	15.5	28.3	54.9	1.0	2.5	40.0	9.8	11.5	84.8	159	32	25	6	0	25	14	+25
Giannis Antetokounmpo	3	139	2019-20	MIL	35.9	46.3	16.0	5.3	1.3	0.3	2.0	17.3	30.0	57.8	1.7	6.0	27.8	10.0	14.0	71.4	108	48	16	4	1	6	6	+35
Devin Booker	3	124	2019-20	PHX	37.3	41.3	4.7	6.0	0.7	0.3	3.3	13.7	20.7	66.1	3.0	6.7	45.0	11.0	11.3	97.1	112	14	18	2	1	10	11	+19
Kyrie Irving	3	149	2019-20	BKN	36.7	49.7	6.3	6.3	0.3	0.3	1.7	17.0	28.7	59.3	6.3	11.7	54.3	9.3	10.0	93.3	110	19	19	1	1	5	12	+51
Joel Embiid	2	90	2019-20	PHI	35.2	45.0	17.5	3.5	2.0	2.0	4.0	16.0	23.5	68.1	1.0	4.0	25.0	12.0	13.5	88.9	70	35	7	4	4	8	7	+40
CJ McCollum	2	82	2019-20	POR	39.5	41.0	7.0	8.5	1.0	0.0	2.0	14.5	27.0	53.7	6.0	11.5	52.2	6.0	7.5	80.0	79	14	17	2	0	4	5	+34
Khris Middleton	2	91	2019-20	MIL	38.3	45.5	7.5	5.5	1.5	0.0	2.0	15.5	27.0	57.4	4.5	9.0	50.0	10.0	10.0	100.0	77	15	11	3	0	4	5	+30
Jayson Tatum	2	82	2019-20	BOS	33.5	41.0	5.5	3.0	2.0	1.0	1.0	14.0	21.0	66.7	5.0	8.0	62.5	8.0	9.0	88.9	67	11	6	4	2	2	4	+36
Kawhi Leonard	2	85	2019-20	LAC	33.0	42.5	7.0	3.0	1.0	0.5	4.5	12.0	23.0	52.2	4.5	6.5	69.2	14.0	14.5	96.6	66	14	6	2	1	9	3	+55
Kemba Walker	2	84	2019-20	BOS	36.8	42.0	7.0	5.0	1.0	0.5	2.0	15.0	25.5	58.8	5.5	13.0	42.3	6.5	8.0	81.3	74	14	10	2	1	4	3	-5
Buddy Hield	2	83	2019-20	SAC	39.8	41.5	5.0	2.5	0.0	0.5	3.0	14.5	25.0	58.0	10.0	17.5	57.1	2.5	3.0	83.3	80	10	5	0	1	6	3	+21
Brandon Ingram	2	89	2019-20	NOP	39.2	44.5	6.5	5.5	1.0	0.5	4.0	16.0	24.5	65.3	2.0	5.5	36.4	10.5	12.5	84.0	78	13	11	2	1	8	8	-9
Austin Rivers	1	41	2019-20	HOU	33.4	41.0	6.0	4.0	2.0	0.0	3.0	14.0	20.0	70.0	6.0	11.0	54.5	7.0	8.0	87.5	33	6	4	2	0	3	3	+11
T.J. Warren	1	53	2019-20	IND	40.6	53.0	4.0	3.0	0.0	2.0	1.0	20.0	29.0	69.0	9.0	12.0	75.0	4.0	4.0	100.0	41	4	3	0	2	1	4	+18
Terry Rozier	1	40	2019-20	CHA	43.8	40.0	4.0	3.0	1.0	0.0	1.0	15.0	26.0	57.7	8.0	13.0	61.5	2.0	3.0	66.7	44	4	3	1	0	1	1	-2
Collin Sexton	1	41	2019-20	CLE	44.8	41.0	3.0	6.0	1.0	0.0	4.0	17.0	30.0	56.7	3.0	9.0	33.3	4.0	4.0	100.0	45	3	6	1	0	4	5	-7
Caris LeVert	1	51	2019-20	BKN	35.8	51.0	4.0	5.0	1.0	0.0	3.0	17.0	26.0	65.4	5.0	10.0	50.0	12.0	18.0	66.7	36	4	5	1	0	3	1	+15
LeBron James	1	40	2019-20	LAL	34.2	40.0	8.0	6.0	0.0	1.0	7.0	17.0	27.0	63.0	5.0	11.0	45.5	1.0	2.0	50.0	34	8	6	0	1	7	1	+12